31. If you used 600 W of power for 60 h, you have used ________.
(a) 36 kWh
(b) 3.6 kWh
(c) 10 kWh
(d) 1 kWh
32. A 3.3 kΩ resistor dissipates 0.25 W. The current is ________.
(a) 8.7 mA
(b) 87 mA
(c) 8.7 µA
(d) 8.7 A
33. A 220 Ω resistor dissipates 3 W. The voltage is ________.
(a) 73.3 V
(b) 2.5 V
(c) 25.7 V
(d) 257 V
34. For 12 V and 34 mA, the power is ________.
(a) 480 mW
(b) 0.480 W
(c) 480,000 µW
(d) all of the above
35. When the current through a 12 kΩ resistor is 8 mA, the power is ________.
(a) 7.68 mW
(b) 768 mW
(c) 7.68 W
(d) 76.8 W
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5555555555 20. A 68 Ω resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is ________. (a) 132 mW (b) 13.2 mW (c) 22.6 mW (d) 226 mW- 5555555555 26. A 120 Ω resistor must carry a maximum current of 25 mA. Its rating should be at least ________. (a) 4.8 W (b) 150 mW (c) 15 mW (d) 480 mW
- 5555555555 17. A 15 V source is connected across a 12 Ω resistor. How much energy is used in three minutes? (a) 938 Wh (b) 0.938 Wh (c) 56.25 Wh (d) 5.6 Wh
- 5555555555 35. When the current through a 12 kΩ resistor is 8 mA, the power is ________. (a) 7.68 mW (b) 768 mW (c) 7.68 W (d) 76.8 W
- 5555555555 33. A 220 Ω resistor dissipates 3 W. The voltage is ________. (a) 73.3 V (b) 2.5 V (c) 25.7 V (d) 257 V