Ohm’s Law Quiz

1. What is the basic Ohm’s Law formula?

V = I × R R = V × I I = V × R

2. In Ohm’s Law, what does V stand for?

Voltage Volume Velocity

3. In Ohm’s Law, what does I stand for?

Insulation Current Impedance only

4. In Ohm’s Law, what does R stand for?

Resistance Relay Rectifier

5. If voltage increases and resistance stays the same, current will usually:

Increase Decrease Stay zero every time

6. If resistance increases and voltage stays the same, current will usually:

Increase Decrease Become voltage

7. If resistance decreases and voltage stays the same, current will usually:

Increase Decrease Disappear

8. Which value represents electrical pressure?

Voltage Resistance Continuity

9. Which value represents opposition to current flow?

Voltage Resistance Frequency

10. Which value represents the flow of electrical charge?

Current Resistance Capacitance only

11. If V = 12 volts and R = 6 ohms, what is current?

2 amps 18 amps 72 amps

12. If V = 24 volts and R = 8 ohms, what is current?

3 amps 16 amps 32 amps

13. If I = 2 amps and R = 10 ohms, what is voltage?

5 volts 12 volts 20 volts

14. If V = 100 volts and I = 10 amps, what is resistance?

10 ohms 90 ohms 1000 ohms

15. If a device has correct voltage but low current, what may be happening?

Resistance may be too high Resistance is definitely zero Voltage no longer matters

16. If resistance is too low, what can happen to current?

Current may become too high Current always becomes zero Current turns into resistance

17. Why does Ohm’s Law help with troubleshooting?

It helps explain how voltage, current, and resistance affect each other It replaces all safety procedures It only applies to anatomy

18. Which statement is correct?

Higher resistance makes current flow harder Higher resistance always increases current Resistance has no effect on current

19. Which statement is correct?

Higher voltage can push more current if resistance stays the same Higher voltage always lowers current Voltage and current are the same thing

20. If resistance doubles and voltage stays the same, current will generally:

Decrease Increase Become voltage

21. If voltage doubles and resistance stays the same, current will generally:

Increase Decrease Stay impossible to calculate

22. Which formula solves for current?

I = V ÷ R I = V × R I = R ÷ V

23. Which formula solves for resistance?

R = V ÷ I R = V × I R = I ÷ V

24. Which formula solves for voltage?

V = I × R V = I ÷ R V = R ÷ I

25. What is the best way to understand Ohm’s Law?

Memorize letters only Understand how voltage, current, and resistance affect each other Ignore resistance