Ohm’s Law and Circuits

(Answers on final slide)

1. The rate of charge flow in a circuit is known as …

A. Resistance

B. Voltage

C. Current

D. Power

E. Electrical Energy

2. The potential difference between the ends of a wire that is required for

current to flow is known as the… A. Resistance

B. Voltage

C. Current

D. Power

E. Electrical Energy

3. The opposition to current flow is called…

A. Resistance

B. Voltage

C. Current

D. Power

E. Electrical Energy

4. Which of these statements are true about electric current?

Choose all that apply.

A. The rate of charge flowB. Measured in OhmsC. Inversely related to resistanceD. Measured in AmperesE. Requires an open circuit to flowF. Requires a potential difference to flowG. All of these statements are trueH. None of these statements are true.

5. Which of the following are factors that affect resistance in a wire?

Choose all that apply. A. material

B. temperature

C. length

D. diameter

E. current flow

F. All of the above

G. None of the above

6. Which statements are true for a series circuit? Choose all that apply.

A. Voltage is the same across all parts

B. Current is the same across all parts

C. Total resistance is the sum of the individual resistors

D. Individual currents add to equal the total current through the system

E. Individual voltages add to equal the total voltage put into the system

F. There is only one path for current to flow

7. Which statements are true for a parallel circuit? Choose all that apply.

A. Voltage is the same across all parts

B. Current is the same across all parts

C. Total resistance is the sum of the individual resistors

D. Individual currents add to equal the total current through the system

E. Individual voltages add to equal the total voltage put into the system

F. There are branches of current

8. Electrical energy can be measured in…(Choose all that

apply)A. Watts

B. Ohms

C. Joules

D. Kilowatt-hours

E. Watt seconds

F. Volts

9. The relationship between current, voltage, and resistance in a

circuit is known as…

A. Coulomb’s Law

B. Kirchoff’s Law

C. Ampere’s Law

D. Ohm’s Law

10. If you build circuit A and then add a resistor as in circuit B, the light will

A. Look brighterB. Look less brightC. There will no change in

brightness

A B

11. Which shows the correct way to use an ammeter?

A B

12. Which resistor will have the greatest current?

A. 50 B. 10 C. They have the

same current

13. Which resistor will have the greatest voltage?

A. 50 B. 10 C. They have the

same voltage

14. Which resistor will have the greatest current?

A. 50 B. 10 C. They have the

same current

15. What is the total resistance in this circuit?

A. 6.4 B. 21 C. 38 D. 75

16. What is the total resistance in this circuit?

A. 6.4 B. 21 C. 38 D. 75

Answers

1. C2. B3. A4. ACDF5. ABCD6. BCEF7. ADF8. CDE

9. D10. B11. B12. B13. C14. C15. C16. B