Electrostatics Question 55

Question: The distance between the circular plates of a parallel plate condenser 40mm in diameter, in order to have same capacity as a sphere of radius 1 metre is [MP PET 1992]

Options:

A) 0.01mm

B) 0.1 mm

C) 1.0 mm

D) 10 mm

Show Answer

Answer:

Correct Answer: B

Solution:

4πε0r=ε0Ad

therefore d=A4πr=π(20×103)24π×1=0.1mm



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