1, which one of the following power generation type currently is not used in Ethiopia?

A. Hydro power B. Solar energy C. Wind power D. Geothermal

2. A certain appliance uses 350W. If it is allowed to run continuously for 24 days. How many kilowatt hours of energy does it consumer?

A. 20.16kwh B. 201.6kwh C .2.01kwh D. 8.4kwh

3. A power supply produces a 0.6W output with an input of 0.7W. It's percentage of efficiency?

A. 8.57% B. 42.85% C. 4.28% d. 85.7%

4. 15V source is connected across 12 ohm resistor. How much energy is used in 3 minutes?

A. 938wh b. 0.938wh C. 56.25wh D. 96wh

5. At the end of a14 day's period, your utility bill shows that you have used 18kwh. What is your average daily power?

A. 1.286kwh B. 12.85kwh C. 535kwh D. 252kwh

6. A 120 ohm resistor must carry a maximum current of 25mA. Its rating should be at least?

A. 4.8w B. 75mw C. 15mW D. 480Mw

7. A 6v battery is connected to a 300 ohm load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

A. 1h B. 200h C. 2,000h D. 10h

8. For 12v and 40mA. The power is?

A. 480mW B. 0.480W C. 480,000W. D. all of the above