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Q.

A5µF capacitor is fully charged across a 12 V battery. It is then disconnected from the battery and connected to an uncharged capacitor. The voltage across it is found to be 3 volts. The capacity of uncharged capacitor is

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a

10µF

b

5µF

c

15µF

d

1µF

answer is C.

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Detailed Solution

C×V1−V=C'V;5×10−6×(12−3)=C′×3C′=15×10−6F

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