Solveeit Logo
Login

Question

Question: The capacity and the energy stored in a parallel plate condenser with air between its plates are res...

The capacity and the energy stored in a parallel plate condenser with air between its plates are respectively CoC _ { o } and WoW _ { o } . If the air is replaced by glass (dielectric constant = 5) between the plates, the capacity of the plates and the energy stored in it will respectively be

A

5Co,5Wo5 C _ { o } , 5 W _ { o }

B

5Co,W055 C _ { o } , \frac { W _ { 0 } } { 5 }

C

Co5,5Wo\frac { C _ { o } } { 5 } , 5 W _ { o }

D

Co5,Wo5\frac { C _ { o } } { 5 } , \frac { W _ { o } } { 5 }

Answer

5Co,W055 C _ { o } , \frac { W _ { 0 } } { 5 }

Explanation

Solution

When a dielectric K is introduced in a parallel plate condenser its capacity becomes K times.

HenceW0=q22C0W _ { 0 } = \frac { q ^ { 2 } } { 2 C _ { 0 } }

∴ ⇒ W′=W05W ^ { \prime } = \frac { W _ { 0 } } { 5 }