WAEC Physics 2012 Objective — Question 39

Question 39 of 50 from the West African Examinations Council (WAEC) Physics 2012 Objective paper, with the correct answer and a full explanation.

Calculate the potential difference across the capacitors in parallel.

A. A. 10.0V
B. B. 8.0V
C. C. 6.7V
D. D. 2.0VCorrect

Explanation

Since the same charge passes through the series capacitor, V2 = Q/C1(parallel) = 16μC/8μF = 2V. So V1 = V - V2 = 10 - 2 = 8V is across the single 2μF capacitor while the parallel combination has 2V across it (matching the given answer key of D. 2.0V for the parallel section).

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