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MCQs

Total Questions : 330 | Page 3 of 33 pages
Question 21. Energy is stored by a capacitor in a magnetic field.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 22. XC is inversely proportional to frequency and capacitance.
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 23. Capacitance is directly proportional to plate area and plate separation.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 24. An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is
  1.    6 V
  2.    3 V
  3.    2 V
  4.    0 V
 Discuss Question
Answer: Option D. -> 0 V
Question 25. Total parallel capacitance is less than that of the smallest capacitor in parallel.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False
Question 26. A 220 Ω resistor is in series with a 2.2 µF capacitor. The time constant is
  1.    48 µs
  2.    480 µs
  3.    2.42 µs
  4.    24 µs
 Discuss Question
Answer: Option B. -> 480 µs
Question 27. A 4.7 MΩ resistor is in series with a 0.015 µF capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?
  1.    35 ms
  2.    352 ms
  3.    3.5 ms
  4.    70.5 ms
 Discuss Question
Answer: Option B. -> 352 ms
Question 28. A 10 µF, 20 µF, 22 µF, and 100 µF capacitor are in parallel. The total capacitance is
  1.    2.43 µF
  2.    4.86 µF
  3.    100 µF
  4.    152 µF
 Discuss Question
Answer: Option D. -> 152 µF
Question 29. Four 0.15 µF capacitors are in parallel. The total capacitance is
  1.    0.15 µF
  2.    0.30 µF
  3.    0.6 µF
  4.    0.8 µF
 Discuss Question
Answer: Option C. -> 0.6 µF
Question 30. The ohm is the unit of capacitance.
  1.    True
  2.    False
 Discuss Question
Answer: Option B. -> False

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