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+1 vote
49.0k views
in Physics by (36.3k points)

Effective capacitance of parallel combination of two capacitors C1 and C2 is 10 µF. When these capacitors are individually connected to a voltage source of 1V, the energy stored in the capacitor C2 is 4 times that of C1. If these capacitors are connected in series, their effective capacitance will be :

(1) 3.2 µF

(2) 8.4 µF

(3) 1.6 µF

(4) 4.2 µF

2 Answers

+1 vote
by (51.9k points)
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Best answer

Answer is (3) 1.6 μF

Given C1 + C2 = 10 μF ....(i)

4C1 = C2 ...(ii)

from equation (i) & (ii)

C1 = 2μF

C2 = 8μF

If they are in series

+1 vote
by (33.0k points)

Answer is (3) 1.6 µF

C1 + C2 = 10 ....(i)

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