Energy and Power - General Questions (2)

Directions to Solve

Energy and Power - General Questions

9.

A 220 resistor dissipates 3 W. The voltage is

A.	73.3 V
B.	2.5 V
C.	25.7 V
D.	257 V

Answer: Option C

Explanation:

No answer description available for this question.

10.

For 12 V and 40 mA, the power is

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

Answer: Option D

Explanation:

No answer description available for this question.

11.

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:

No answer description available for this question.

12.

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:

No answer description available for this question.

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:

No answer description available for this question.

14.

In 40 kW, there are

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

Answer: Option B

Explanation:

No answer description available for this question.

15.

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:

No answer description available for this question.

16.

A power supply produces a 0.6 W output with an input of 0.7 W. Its percentage of efficiency is

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

Answer: Option D

Explanation:

No answer description available for this question.

1
2
3