Electrostatics Question 105

Question: 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 [CPMT 1999; KCET 2000; Pb. PMT 1999, 2001]

Options:

A) 0.012 J

B) 0.0218 J

C) 0.0375 J

D) 3.75 J

Show Answer

Answer:

Correct Answer: C

Solution:

ΔU=12C1C2(V2V1)2(C1+C2)

=(3×5)×1012×(500300)2(3+5)×106

=15×1012×4×1048×106=0.0375J



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