Lakshya Education MCQs

Question: How many watt-hours represent 65 W used for 18 h?
Options:
A.11.7 Wh
B.1,170 Wh
C.11,700 Wh
D.117,000 Wh
Answer: Option B

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More Questions on This Topic :

Question 1. Energy equals power multiplied by time.
  1.    True
  2.    False
Answer: Option A
Question 2. Watt's law states the relationships of power to energy.
  1.    True
  2.    False
Answer: Option B
Question 3. A 3.3 kΩ resistor dissipates 0.25 W. The current is
  1.    8.7 mA
  2.    87 mA
  3.    8.7 µA
  4.    8.7 A
Answer: Option A
Question 4. For 12 V and 40 mA, the power is
  1.    480 mW
  2.    0.480 W
  3.    480,000 µW
  4.    All of the above
Answer: Option D
Question 5. If you used 400 W of power for 30 h, you have used
  1.    1.3 kWh
  2.    13.3 kWh
  3.    1.2 kWh
  4.    12 kWh
Answer: Option D
Question 6. A 220 Ω resistor dissipates 3 W. The voltage is
  1.    73.3 V
  2.    2.5 V
  3.    25.7 V
  4.    257 V
Answer: Option C

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