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.
