1 .		Three hundred joules of energy are consumed in 15 s. The power is [Hint]   2,000 W   2 W   20 W   200 W
2 .		If it takes 400 ms to use 12,000 J of energy, the power is [Hint]   30 kW   30 W   3 W   300 kW
3 .		In 40 kW, there are [Hint]   0.4 mW   40,000 W   400 W   5,000 W
4 .		In 0.025 W, there are [Hint]   25 kW   0.00025 mW   2,500 µW   25 mW
5 .		For 12 V and 40 mA, the power is [Hint]   480 mW   0.480 W   480,000 µW   all three other responses
6 .		When the current through a 12 k resistor is 8 mA, the power is [Hint]   7.68 mW   768 mW   7.68 W   76.8 W
7 .		A 3.3 k resistor dissipates 0.25 W. The current is [Hint]   8.7 mA   87 mA   8.7 µA   8.7 A
8 .		A 220 resistor dissipates 3 W. The voltage is [Hint]   73.3 V   2.5 V   25.7 V   257 V
9 .		If you used 400 W of power for 30 h, you have used [Hint]   1.3 kWh   13.3 kWh   1.2 kWh   12 kWh
10 .		If you used 600 W of power for 60 h, you have used [Hint]   36 kWh   3.6 kWh   10 kWh   1 kWh
11 .		How many watt-hours represent 65 W used for 18 h? [Hint]   11.7 Wh   1,170 Wh   11,700 Wh   117,000 Wh
12 .		A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least [Hint]   4.8 W   150 mW   15 mW   480 mW
13 .		The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be [Hint]   2 W   1 W   5 W   0.5 W
14 .		A 33 half-watt resistor and a 330 half-watt resistor are connected across a 12 V source. Which one(s) will overheat? [Hint]   33   330   both resistors   neither resistor
15 .		When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is [Hint]   overheated   shorted   open   reversed
16 .		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? [Hint]   1 hr   200 hr   2,000 hr   10 hr
17 .		A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is [Hint]   0.58 Ah   2.1 Ah   21 Ah   58 Ah
18 .		A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is [Hint]   8.57%   42.85%   4.28%   85.7%
19 .		A certain appliance uses 350 W. If it is allowed to run continuously for 24 days, how many kilowatt-hours of energy does it consume? [Hint]   20.16 kWh   201.6 kWh   2.01 kWh   8.4 kWh
20 .		At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power? [Hint]   1.286 kWh   12.85 kWh   535 kWh   252 kWh
21 .		A 68 resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is [Hint]   132 mW   13.2 mW   22.6 mW   226 mW
22 .		A 75 load uses 2 W of power. The output voltage of the power supply is approximately [Hint]   120 V   1.2 V   12 V   6 V
23 .		How much continuous current can be drawn from a 60 Ah battery for 14 h? [Hint]   42.8 A   428 A   4.28 A   4.2 A
24 .		A 15 V source is connected across a 12 resistor. How much energy is used in three minutes? [Hint]   938 Wh   0.938 Wh   56.25 Wh   5.6 Wh
25 .		A half-watt is equal to how many milliwatts? [Hint]   5,000 mW   5 mW   500 mW   50 mW