Electrostatics Question 38

Question: There is an air filled $ 1pF $ parallel plate capacitor. When the plate separation is doubled and the space is filled with wax, the capacitance increases to$ 2pF $ . The dielectric constant of wax is [MNR 1998; KCET 2005]

Options:

A) 2

B) 4

C) 6

D) 8

Show Answer

Answer:

Correct Answer: B

Solution:

$ C=\frac{{\varepsilon _{0}}A}{d}=1pF $ and $ C’=\frac{K{\varepsilon _{0}}A}{2d}=2pF $

K = 4.



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