Electrical Engineering - Energy and Power

Exercise :: Energy and Power - General Questions

21. 

The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

A. 2 W
B. 1 W
C. 5 W
D. 0.5 W

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

22. 

How much continuous current can be drawn from a 60 Ah battery for 14 h?

A. 42.8 A
B. 428 A
C. 4.28 A
D. 4.2 A

Answer: Option C

Explanation:

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23. 

A 75 load uses 2 W of power. The output voltage of the power supply is approximately

A. 120 V
B. 1.2 V
C. 12 V
D. 6 V

Answer: Option C

Explanation:

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24. 

When the current through a 12 k resistor is 8 mA, the power is

A. 7.68 mW
B. 768 mW
C. 7.68 W
D. 76.8 W

Answer: Option B

Explanation:

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25. 

A 68 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

Answer: Option A

Explanation:

No answer description available for this question. Let us discuss.

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