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MCQs

Total Questions : 59 | Page 5 of 6 pages
Question 41. If it takes 400 ms to use 12,000 J of energy, the power is
  1.    3 W
  2.    300 kW
  3.    30 kW
  4.    30 W
 Discuss Question
Answer: Option C. -> 30 kW
Question 42. In 40 kW, there are
  1.    400 W
  2.    40,000 W
  3.    0.4 mW
  4.    5,000 W
 Discuss Question
Answer: Option B. -> 40,000 W
Question 43. If you used 600 W of power for 60 h, you have used
  1.    1 kWh
  2.    3.6 kWh
  3.    36 kWh
  4.    10 kWh
 Discuss Question
Answer: Option C. -> 36 kWh
Question 44. How many watt-hours represent 65 W used for 18 h?
  1.    117,000 Wh
  2.    11.7 Wh
  3.    11,700 Wh
  4.    1,170 Wh
 Discuss Question
Answer: Option D. -> 1,170 Wh
Question 45. A 3.3 k resistor dissipates 0.25 W. The current is
  1.    8.7 µA
  2.    87 mA
  3.    8.7 mA
  4.    8.7 A
 Discuss Question
Answer: Option C. -> 8.7 mA
Question 46. A 220 resistor dissipates 3 W. The voltage is
  1.    25.7 V
  2.    2.5 V
  3.    73.3 V
  4.    257 V
 Discuss Question
Answer: Option A. -> 25.7 V
Question 47. For 12 V and 40 mA, the power is
  1.    All of these
  2.    0.480 W
  3.    480,000 µW
  4.    480 mW
 Discuss Question
Answer: Option A. -> All of these
Question 48. Three hundred joules of energy are consumed in 15 s. The power is
  1.    200 W
  2.    2,000 W
  3.    2 W
  4.    20 W
 Discuss Question
Answer: Option D. -> 20 W
Question 49. A half-watt is equal to how many milliwatts?
  1.    5 mW
  2.    5,000 mW
  3.    50 mW
  4.    500 mW
 Discuss Question
Answer: Option D. -> 500 mW
Question 50. The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be
  1.    0.5 W
  2.    5 W
  3.    1 W
  4.    2 W
 Discuss Question
Answer: Option D. -> 2 W

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