Electrostatics Question 39

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

Options:

A) 5Co, 5Wo

B) 5Co, W05

C) Co5, 5Wo

D) Co5,Wo5

Show Answer

Answer:

Correct Answer: B

Solution:

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

Hence C=5C0 .

Energy stored W0=q22C0 W=q22C=q22×5C0

therefore W=W05



NCERT Chapter Video Solution

Dual Pane