Electrostatics Question 95

Question: If a slab of insulating material $ 4\times {{10}^{-3}}m $ thick is introduced between the plates of a parallel plate capacitor, the separation between plates has to be increased by $ 3.5\times {{10}^{-3}}m $ to restore the capacity to original value. The dielectric constant of the material will be [AMU (Med.) 1999]

Options:

A) 6

B) 8

C) 10

D) 12

Show Answer

Answer:

Correct Answer: B

Solution:

$ K=\frac{t}{t-d’}=\frac{4\times {{10}^{-3}}}{4\times {{10}^{-3}}-3.5\times {{10}^{-3}}}=8 $



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