Electrostatics Question 144

Question: An air filled parallel plate capacitor has capacity C. If distance between plates is doubled and it is immersed in a liquid then capacity becomes twice. Dielectric constant of the liquid is [BCECE 2004]

Options:

A) 1

B) 2

C) 3

D) 4

Show Answer

Answer:

Correct Answer: D

Solution:

C=ε0Ad ……(i) C=ε0KA2d ……(ii) From equation (i) and (ii) CC=K2

therefore 2=K2K=4



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