1.
Energy equals power multiplied by time.

2.
How many watt-hours represent 65 W used for 18 h?

3.
For 12 V and 40 mA, the power is

4.
If you used 400 W of power for 30 h, you have used

5.
A 220 Ω resistor dissipates 3 W. The voltage is

6.
At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

7.
How much continuous current can be drawn from a 60 Ah battery for 14 h?

8.
A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

9.
A 3.3 kΩ resistor dissipates 0.25 W. The current is

10.
Watt's law states the relationships of power to energy.

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