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Energy and Power

Energy and Power
A 3.3 k resistor dissipates 0.25 W. The current is

8.7 µA
8.7 A
87 mA
8.7 mA

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Energy and Power
A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat?

330
both resistors
neither resistor
33

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Energy and Power
A 6 V battery is connected to a 300 load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

10 h
1 h
200 h
2,000 h

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Energy and Power
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

1.286 kWh
252 kWh
535 kWh
12.85 kWh

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Energy and Power
For 12 V and 40 mA, the power is

480 mW
0.480 W
All of these
480,000 µW

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Energy and Power
If it takes 400 ms to use 12,000 J of energy, the power is

30 kW
30 W
3 W
300 kW

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