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Industrial Electricity
Name: _____________________________ Worksheet #3: Ohm’s Law & Watt’s Law
Instructions: Please report your answers using the abbreviations for the favored electrical prefixes as previously discussed. The abbreviations you might use include those representing the prefixes pico, nano, micro, milli, kilo, mega, & giga. You may not need to use an abbreviation in all cases. Ohm’s Law problems:
1. E = 100 volts, I = 2 amperes, then R = ___________ Ω
2. E = 50V, R= 1000 ohms, then I = _____________ A
3. I = 0.5 amps, R = 50 Ω, then E = _________V
4. E = 10 kV, I = 0.001 amps, then R = ____________Ω
5. I = 0.05 A, R= 1000 ohms, then E = _________V
6. I = 0.125 amps, R= 100 Ω, then E = ____________V
7. E = 500 Volts, I = 2 amps, then R = ____________Ω
8. I = 20 milliamperes, E = 100 volts, then R = ______Ω
9. E = 1 kilo-volt, R = 1 kilo-ohm, then I = ________A
10. I = 100 mA, R = 100 ohms, then E = _____________V
11. E = 50 microvolts, R = 10 kΩ, then I = __________A
Watt’s Law (Power) problems:
12. P= 10 watts, I = 2 amperes, then E = __________ V
13. E = 100 volts, I = 0.5 amps, then P = __________ W
14. P = 500 watts, E = 250 V, then I = __________ A
15. P = 100 watts, I = 2A, then R = ____________Ω
16. E = 10 kV, P = 10 mW, then R = _____________Ω
17. E = 100 V, R = 1 kΩ, then P = _________________ W
18. P = 0.5 watts, R = 50 Ω, then E= ________________ V
19. I = 10mA, E = 50 volts, then P = _________________ W
20. E = 600 V, P = 300µW, then I = ________________ A
Notice that I am not asking you to show your work for this worksheet. However, you will be quizzed on this material, so be prepared to do so. Always, always, always, ASK if you don’t understand something!
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