what happens to the brightness of each bulb in a series circuit…..if you add more bulbs?
TRANSCRIPT
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•What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?
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•The current in a DC series circuit:
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•The current in a DC series circuit:
Is the same in all points of the circuit
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•If you compare an electrical circuit to a system that carries water, what would the water pipes represent?
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•If you compare an electrical circuit to a system that carries water, what would the water pipes represent?
•WIRES
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•The ability of an object to resist current is called:
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•The ability of an object to resist current is called:
•Electrical resistance
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•Objects that conduct electricity poorly are called =
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•Objects that conduct electricity poorly are called =
= INSULATORS
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•A circuit with a switch turned to the OFF position or a circuit with any break is called:
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•A circuit with a switch turned to the OFF position or a circuit with any break is called:
•OPEN CIRCUIT
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WHOLE BRAIN TIME-Please turn to your partner and discuss- - The current in DC circuits- - Insulators- - electrical resistance- - wires are like what?
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WHAT Type of Circuits ARE THEY?
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•The mathematical relationship between current, voltage, and resistance is known as:
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•The mathematical relationship between current, voltage, and resistance is known as:
•OHM’s LAW
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•What is the current in each resistor in the circuit?
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•What is the current in each resistor in the circuit?
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WHOLE BRAIN TIME
-- Turn to your partner and discuss
--When do you use that weird formula--Will that weird formula be on the test--How do you find current in a parallel circuit
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•A circuit diagram: =
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•A circuit diagram: = makes wiring easier =
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•A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit
=
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•A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit
= can be interpreted (understood) by anyone familiar with electricity
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•A circuit diagram: = makes wiring easier = uses symbols to represent each part of the circuit
= can be interpreted (understood) by anyone familiar with electricity
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A closed Circuit is =
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A closed Circuit is = = ON
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•In many circuit diagrams, any device that uses electrical energy is represented by a:
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•In many circuit diagrams, any device that uses electrical energy is represented by a:
•resistor
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•A device that uses chemical energy to push current in a circuit is called a =
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•A device that uses chemical energy to push current in a circuit is called a =
= A BATTERY
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WHOLE BRAIN TIME
-- Turn to your partner and discuss
--What does a battery do--When is a resistor shown--How do you know it is a closed circuit-Talk about a circuit diagram
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•Electrical current will pass easily through =
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•Electrical current will pass easily through =
= CONDUCTOR
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•As Jing toasts her morning waffle in the family toaster, 3.0 amperes of current flows with a voltage of 150 volts across the toaster. The resistance of the toaster is:
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•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
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•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
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•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
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•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
![Page 44: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/44.jpg)
•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
![Page 45: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/45.jpg)
•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
![Page 46: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/46.jpg)
•A stereo receiver is plugged into a 120-volt outlet. If the receiver has a resistance of 360 ohms, how much current does it use?
![Page 47: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/47.jpg)
•What happens to the current in a circuit with fixed voltage if you increase the resistance of the circuit?
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•What happens to the current in a circuit with fixed voltage if you increase the resistance of the circuit?
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•What happens to the current in a circuit with fixed voltage if you increase the resistance of the circuit?
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•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
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•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
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•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 53: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/53.jpg)
•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 54: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/54.jpg)
•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 55: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/55.jpg)
•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 56: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/56.jpg)
•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 57: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/57.jpg)
•A light bulb requires 3 amps to produce light. The resistance of the bulb is 4 ohms. How many batteries do you need if each battery is 1.5 volts?
![Page 58: What happens to the brightness of each bulb in a series circuit…..if you add more bulbs?](https://reader030.vdocuments.site/reader030/viewer/2022032702/56649cd85503460f949a04d3/html5/thumbnails/58.jpg)
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Total Voltage = Total Resistance =
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Total Voltage = 9 V Total Resistance =
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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Total Voltage = 9 V Total Resistance = 4.5 ohms
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What is the voltage drop across each resistor?
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What is the voltage drop across each resistor?
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What is the voltage drop across each resistor?
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What is the voltage drop across each resistor?
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What is the voltage drop across each resistor?
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So in a series circuit (like the one we just did), what can we say about voltage drops?
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So in a series circuit (like the one we just did), what can we say about voltage drops?
If you add all the voltage drops( 4 + 4 + 4) = EQUALS the totalVoltage…..right?
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Is current the same though all components of a series circuit?
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The current in each resistor is?
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The current in each resistor is?
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The current in each resistor is?
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The current in each resistor is?
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•Is the current the same across each of these resistors? Why or Why not?
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•Is the current the same across each of these resistors? Why or Why not?
•YES……because…..?
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•Is the current the same across each of these resistors? Why or Why not?
•YES……DC circuit
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•Is the current the same across each of these resistors? Why or Why not?
•YES……DC circuit
•To calculate butUse Total Resistance