Physics: Ohm's Law

Test Quiz

1. According to Ohm's Law, current equals the voltage divided by the _________.

a. Resistance

b. Inductance

c. Capacitance

d. Power

e. Conductance

2. What equation would you use to solve for voltage?

a. V = I/R

b. V = PR

c. V = CI

d. V = IR

e. V = R/I

3. What does the letter 'I' stand for in Ohm's Law?

a. Resistance

b. Inductance

c. Capacitance

d. Voltage

e. Current

4. What does the letter 'R' stand for in Ohm's Law?

a. Resistance

b. Inductance

c. Capacitance

d. Reactance

e. Rate of change

5. If the current in an electrical circuit is constant, what will happen to the voltage if the resistance is increased?

a. The voltage will decrease

b. The voltage will increase

c. The voltage will stay the same

d.

e.

6. If there are 10 Volts across a 5 Ohm resistor, what is the current?

a. 0.5 Amps

b. 1 Amp

c. 2 Amps

d. 15 Amps

e. 50 Amps

7. If there are 40 Volts and 5 Amps running through an electrical circuit, what is the resistance of the circuit?

a. 1 Ohm

b. 2 Ohms

c. 4 Ohms

d. 6 Ohms

e. 8 Ohms

8. If there are 7 Amps running through a 3 Ohm resistor, what will the voltage be across the resistor?

a. 2.5 Volts

b. 10 Volts

c. 17 Volts

d. 21 Volts

e. 42 Volts

9. If you increase the voltage across a resistor, what will happen to the current?

a. The current will decrease

b. The current will increase

c. The current will stay the same

d.

e.

10. If you increase the size of the resistor and keep the voltage the same, what will happen to the current?

a. The current will decrease

b. The current will increase

c. The current will stay the same

d.

e.

**About this quiz:** All the questions on this quiz are based on information that can be found on the Physics: Ohm's Law page at www.ducksters.com/science/physics/ohms_law.php.

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