Electrostatics Question 29
Question: A parallel plate condenser is connected with the terminals of a battery. The distance between the plates is$ 6mm $ . If a glass plate (dielectric constant$ K=9 $ ) of $ 4.5mm $ is introduced between them, then the capacity will become
Options:
A) 2 times
B) The same
C) 3 times
D) 4 times
Show Answer
Answer:
Correct Answer: C
Solution:
$ C\propto \frac{1}{d} $
therefore $ \frac{C _{medium}}{C _{air}}=\frac{d}{d-t+\frac{t}{K}}=\frac{6}{6-4.5+\frac{4.5}{9}}=\frac{6}{2}=3 $
