Q. The capacity of a parallel plate condenser is $15\mu\ F,$ when the distance between its plates is $6\ cm.$ If the distance between the plates is reduced to $2\ cm,$ then the capacity of this parallel plate condenser will be
A) $15\mu\ F$
B) $30\mu\ F$
C) $45\mu\ F$
D) $60\mu\ F$
Explanation
(c) $C \propto \frac{1}{d} \Rightarrow \frac{C_{1}}{C_{2}} = \frac{d_{2}}{d_{1}} \Rightarrow \frac{15}{C_{2}} = \frac{2}{6} \Rightarrow C_{2} = 45\mu F$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.