The capacity of a parallel plate condenser is C. When the distance between the plates is halved, its capacity is

Options

A. 2 C
B. C
C. 0.25 C
D. 0.2 C

Answer

A

Explanation

`d_(2)=d_(1)/2,C_(2)=?,C_(1)=C`
`Cprop1/d`
`Now" "C_(2)/C_(1)=d_(1)/d_(2)`
`C_(2)=(C_(1)d_(1))/d_(2)=(Cd_(1))/(d_(1)/2)=2C`