## Answer & Solution

**Option C**

1.

A 220 Ω resistor dissipates 3 W. The voltage is

2.

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

3.

For 12 V and 40 mA, the power is

4.

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

5.

Energy equals power multiplied by time.

6.

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

7.

A 3.3 kΩ resistor dissipates 0.25 W. The current is

8.

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

9.

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

10.

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