Question

The capacity of a condenser in which a dielectric of

dielectric constant 5 has been used, is

C

. If the

dielectric is replaced by another with dielectric

constant 20, the capacity will become​

Answer 1

Answer:

The capacity of the capacitor will become 20 times the original capacity C.

Explanation:

If the original capacity of the condenser is C then after introducing a dielectric it's capacity increases K times where K is the dielectric constant.

Answer 2

Answer:

The new capacity will be 4 times the previous value.

Explanation:

• The expression for a capacity of a condenser is

$C=\frac{\epsilon A}{d}$ where A is the area ,d is the distance between the plates ,also

$\epsilon$ is the electric permeability which is proportional to the dielectric constant k.

• Thus,C is proportional to k.
• Now,with k being changed to 20 from 4,that is,4 times C will also be 4 times.
• Thus,the new capacity will be 4 times its previous value.