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Home › Physics › Capacitance

Capacitance — Physics Questions & Practice

Practise 168 Capacitance questions from Physics for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on Capacitance — with answers

Try each question first, then open the answer. Explanations are included.

1. A capacitor with a capacitance of 20 microfarad is connected to a 7 V supply. What charge does it store? (Q = CV)

  1. A140
  2. B170.274
  3. C153.483
  4. D145
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Answer: A

Charge Q = C x V = 20 x 7 = 140 microcoulombs.

2. A capacitor with a capacitance of 200 microfarad is connected to a 21 V supply. What charge does it store? (Q = CV)

  1. A4592.503
  2. B4896.708
  3. C3594.062
  4. D4200
Show answer

Answer: D

Charge Q = C x V = 200 x 21 = 4200 microcoulombs.

3. A capacitor with a capacitance of 100 microfarad is connected to a 6 V supply. What charge does it store? (Q = CV)

  1. A600
  2. B610
  3. C595
  4. D638.519
Show answer

Answer: A

Charge Q = C x V = 100 x 6 = 600 microcoulombs.

4. A capacitor with a capacitance of 1 microfarad is connected to a 5 V supply. What charge does it store? (Q = CV)

  1. A5
  2. B4.517
  3. C5.015
  4. D4
Show answer

Answer: A

Charge Q = C x V = 1 x 5 = 5 microcoulombs.

5. A capacitor with a capacitance of 10 microfarad is connected to a 15 V supply. What charge does it store? (Q = CV)

  1. A155
  2. B132.825
  3. C151
  4. D150
Show answer

Answer: D

Charge Q = C x V = 10 x 15 = 150 microcoulombs.

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