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Q.

A capacitor 4µF charged to 50V is connected to another capacitor 2µF charged to 100V. The total energy of combination is

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a

13.3×10−3J

b

20×10−3J

c

5×10−3J

d

10×10−3J

answer is A.

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Detailed Solution

V=C1V1+C2V2C1+C2; U=12C1+C2V2
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