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Q.

Two insulated metallic spheres of 3μF and 5μF capacitances are charged to 300 V and 500V respectively. The energy loss, when they are connected by a wire is

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a

0.012 J

b

0.0218 J

c

0.0375 J

d

3.75 J

answer is C.

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Detailed Solution

ΔU=12C1C2V2−V12C1+C2=(3×5)×10−12×(500−300)2(3+5)×10−6=15×10−12×4×1048×10−6=0.0375J
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