Chapter 6 Section 5

Resistance in Series and Parallel Circuits

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now 65 Quiz WDYSWDYT p 644

bull Agenda Do Now Investigation 66

Investigation 66bull Step 1 Setup wires and light bulbs as

shown

Investigation 66bull 2 Compare circuit set up

to picture to the rightbull Answer 2a and 2b

bull Write predictions for questions 4 and 5

Investigation 66bull 6 Add voltmeter and take

measurements (use diagram)

bull 7 Add ammeter and take measurements (use diagram)

bull 8 Make predictions and ask teacher to experiment procedure approval

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now 65 Quiz WDYSWDYT p 644

bull Agenda Do Now Investigation 66

Investigation 66bull Step 1 Setup wires and light bulbs as

shown

Investigation 66bull 2 Compare circuit set up

to picture to the rightbull Answer 2a and 2b

bull Write predictions for questions 4 and 5

Investigation 66bull 6 Add voltmeter and take

measurements (use diagram)

bull 7 Add ammeter and take measurements (use diagram)

bull 8 Make predictions and ask teacher to experiment procedure approval

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Investigation 66bull Step 1 Setup wires and light bulbs as

shown

Investigation 66bull 2 Compare circuit set up

to picture to the rightbull Answer 2a and 2b

bull Write predictions for questions 4 and 5

Investigation 66bull 6 Add voltmeter and take

measurements (use diagram)

bull 7 Add ammeter and take measurements (use diagram)

bull 8 Make predictions and ask teacher to experiment procedure approval

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Investigation 66bull 2 Compare circuit set up

to picture to the rightbull Answer 2a and 2b

bull Write predictions for questions 4 and 5

Investigation 66bull 6 Add voltmeter and take

measurements (use diagram)

bull 7 Add ammeter and take measurements (use diagram)

bull 8 Make predictions and ask teacher to experiment procedure approval

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Investigation 66bull 6 Add voltmeter and take

measurements (use diagram)

bull 7 Add ammeter and take measurements (use diagram)

bull 8 Make predictions and ask teacher to experiment procedure approval

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

HW PTG 66 p 658 1-13bull Learning Objective

Explain conservation of energy and conservation of charge in a circuit

bull Success Criteria Assemble a switch in a circuit

with parallel components to control a particular lamp

Use the conservation of energy to determine how currents and voltages are distributed in series and parallel circuits

Use Ohmrsquos Law to derive equations for the total resistance of multiple resistors in series and parallel circuits

bull Do Now How do you calculate the

total resistance in a parallel circuit

bull Agenda Do Now Investigation 66

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How do switches work bull Switches are placed in

series with the device they control

bull When the switch is on a copper wire connects the circuit keeping it ldquoclosedrdquo

bull When the switch is off the copper is replaced by an air gap Since air has VERY high resistance the electricity can not travel and the switch is ldquoopenrdquo

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How does current work in

a series circuitbull The same current goes

through each resistor and is equal to the total

bull IT=I1=I2=I3

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How does current work in

a parallel circuitbull The amount of current

entering the junction must be equal to the current leaving the junction (see diagram)

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull Whatrsquos another way to

visualize the current at each junction

bull Each path represents 3 amps of current

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How do you calculate the

total current in a circuitbull IT=I1+I2+I3

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How does voltage work in

a series circuitbull Voltage is split among the

resistors but not always evenly For example for a 6V battery one bulb may get 3V the next 2V and the third 3V

bull VT=V1+V2+V3

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How does voltage work in

a parallel circuitbull The voltage is the same in

each resistorbull VT=V1=V2=V3

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talkbull How do you calculate

resistance in a series circuit

bull How do you calculate resistance in a parallel circuit

bull RT=R1+R2+R3

321

1111

RRRRT

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Physics Talk 66bull How does Ohmrsquos Law

apply

bull How do you calculate power

bull Ohmrsquos law can be applied to the entire circuit or to any resistor in the circuit

bull VT=ITRT

bull V1=I1R1

bull Power can also be calculated for the entire circuit or for any resistor in the circuit

bull PT=ITVT

bull P1=I1V1

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Sample Problem 1bull Given the following series

circuit findbull a) the total resistancebull b) the total currentbull c) the current through

each resistor bull d) the voltage across each

resistorbull e) the total powerbull f) the power dissipated by

each resistor

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Labeling the Diagram

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Sample Problem 2bull Given the following

parallel circuit findbull a) the current through

each resistorbull b) the total currentbull c) the total powerbull d) the power in each

resistorbull e) the total resistance

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Labeling the Diagram

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions

Essential Questions

bullP 656 ndash WDYTNbullP 657

What does it meanHow do you knowWhy do you believeWhy should you care

• Chapter 6 Section 5
• HW PTG 66 p 658 1-13
• Investigation 66
• Investigation 66 (2)
• Investigation 66 (3)
• HW PTG 66 p 658 1-13 (2)
• Physics Talk 66
• Physics Talk 66 (2)
• Physics Talk 66 (3)
• Physics Talk 66 (4)
• Physics Talk 66 (5)
• Physics Talk 66 (6)
• Physics Talk 66 (7)
• Physics Talk
• Physics Talk 66 (8)
• Sample Problem 1
• Labeling the Diagram
• Sample Problem 2
• Labeling the Diagram (2)
• Essential Questions