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Q.

In the given circuit (figure), the potential difference across the capacitor is 12 V. Each resistance is of  3  Ω. The cell is ideal. The emf of the cell is

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a

9 V

b

12 V

c

24 V

d

15 V

answer is A.

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Detailed Solution

On the steady state, no current flows through the capacitor

Question Image

i3R+iR=12 V

4×i3×3=12⇒i=3 A

On considering KVL

E=2i3R+iR=5iR3=15 V

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