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MCQs

Total Questions : 59 | Page 4 of 6 pages
Question 31. The watt is the unit of power.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 32. A resistor normally opens when it burns out.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 33. Power rating is related to resistance value.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 34. The power rating of a resistor determines the minimum power that it can handle safely.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 35. A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is
  1.    58 Ah
  2.    2.1 Ah
  3.    0.58 Ah
  4.    21 Ah
 Discuss Question
Answer: Option D. -> 21 Ah
Question 36. At the end of a 14 day period, your utility bill shows that you have used 18 kWh. What is your average daily power?
  1.    1.286 kWh
  2.    535 kWh
  3.    12.85 kWh
  4.    252 kWh
 Discuss Question
Answer: Option A. -> 1.286 kWh
Question 37. A 15 V source is connected across a 12 resistor. How much energy is used in three minutes?
  1.    56.25 Wh
  2.    0.938 Wh
  3.    938 Wh
  4.    5.6 Wh
 Discuss Question
Answer: Option B. -> 0.938 Wh
Question 38. A 120 resistor must carry a maximum current of 25 mA. Its rating should be at least
  1.    480 mW
  2.    150 mW
  3.    4.8 W
  4.    15 mW
 Discuss Question
Answer: Option B. -> 150 mW
Question 39. If you used 400 W of power for 30 h, you have used
  1.    1.2 kWh
  2.    13.3 kWh
  3.    1.3 kWh
  4.    12 kWh
 Discuss Question
Answer: Option D. -> 12 kWh
Question 40. 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?
  1.    2,000 h
  2.    10 h
  3.    200 h
  4.    1 h
 Discuss Question
Answer: Option A. -> 2,000 h

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