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JAMB Physics 2000 Question 30

Question 30

Capacitors

The diagram above shows two capacitors P and Q of capacitances 5 μF and 10 μF. Find the charges stored in P and Q respectively.

Diagram for this question
  1. A.200 μC and 100 μC
  2. B.100 μC and 200 μC
  3. C.4 μC and 2 μC
  4. D.2 μC and 4 μC.
Show the answer and explanation

Answer: B (100 μC and 200 μC)

Explanation

P and Q are in parallel across 20 V, so Q = CV: 5 μF × 20 V = 100 μC and 10 μF × 20 V = 200 μC.