Electrostatics Question 111

Question: The capacity of a parallel plate condenser is 10μF , when the distance between its plates is 8 cm. If the distance between the plates is reduced to 4 cm, then the capacity of this parallel plate condenser will be [CBSE PMT 2001]

Options:

A) 5μF

B) 10μF

C) 20μF

D) 40μF

Show Answer

Answer:

Correct Answer: C

Solution:

C∝1d⇒C1C2=d2d1 so C210=84⇒C2=20μF

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