Question

In the given circuit, the potential difference across
3 uF capacitor will be :
20V
3uF+
5uF
4V
th
(1) 16 V
(2) 10 V
(4) 4 V
(3) 6 V​

Answer 1

The potential difference across  3 uF capacitor will be 10 v

Explanation:

• Both capacitor and battery are in series so  

V(eq) = 20 - 4 = 16 v

C (e q) =  3×5 /  5+3  =    15 /  8

q = C( eq)  ×V( eq)  =  15/8  × 16 = 30

V3 = q /c  = 30 / 3 = 10 v

Thus the potential difference across  3 uF capacitor will be 10 v

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