Electrical Engineering - Energy and Power

Exercise :: Energy and Power - General Questions

11. 

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?

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

Answer: Option C

Explanation:

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12. 

In 40 kW, there are

A. 0.4 mW
B. 40,000 W
C. 400 W
D. 5,000 W

Answer: Option B

Explanation:

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13. 

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

Answer: Option A

Explanation:

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14. 

If it takes 400 ms to use 12,000 J of energy, the power is

A. 30 kW
B. 30 W
C. 3 W
D. 300 kW

Answer: Option A

Explanation:

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15. 

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

A. 11.7 Wh
B. 1,170 Wh
C. 11,700 Wh
D. 117,000 Wh

Answer: Option B

Explanation:

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