# Home / EEE / Energy and Power :: General Questions

### EEE :: Energy and Power

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

2.  A. 33 B. 330 C. both resistors D. neither resistor   3. When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

4.  A. overheated B. shorted C. open D. reversed   5. In 0.025 W, there are

6.  A. 25 kW B. 0.00025 mW C. 2,500 µW D. 25 mW   7. 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?

8.  A. 20.16 kWh B. 201.6 kWh C. 2.01 kWh D. 8.4 kWh   9. A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

10.  A. 8.57% B. 42.85% C. 4.28% D. 85.7%   11. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is

12.  A. 0.58 Ah B. 2.1 Ah C. 21 Ah D. 58 Ah   13. A 15 V source is connected across a 12 resistor. How much energy is used in three minutes?

14.  A. 938 Wh B. 0.938 Wh C. 56.25 Wh D. 5.6 Wh   15. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?

16.  A. 1.286 kWh B. 12.85 kWh C. 535 kWh D. 252 kWh   17. A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least

18.  A. 4.8 W B. 150 mW C. 15 mW D. 480 mW   19. If you used 400 W of power for 30 h, you have used

20.  A. 1.3 kWh B. 13.3 kWh C. 1.2 kWh D. 12 kWh   