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 $
