Electrostatics Question 116

Question: A parallel plate capacitor has plate area A and separation d. It is charged to a potential difference V0. The charging battery is disconnected and the plates are pulled apart to three times the initial separation. The work required to separate the plates is [Kerala PET 2002]

Options:

A) 3ε0AV02d

B) ε0AV022d

C) ε0AV023d

D) ε0AV02d

Show Answer

Answer:

Correct Answer: D

Solution:

Work done W=UfUi

Ui=12CV02 and Uf=12(C)3.(3V0)2

=3×12CV02 So W=ε0AV02d



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