Question

The potential difference between the two plates of a parallel plate capacitor is constant. When air between the plates is replaced by dielectric material, the electric field intensity :

A

Decreases

B

Remains unchanged

C

Becomes zero

D

Increases

Medium

Solution

verified
Verified by Toppr
Correct option is A)

In general capacitance of parallel plate capacitor is given by: 

where C is capacitance, k is relative permittivity of dielectric material, is permittivity of free space constant, A is area of plates and d is distance between them. 

Therefore, the capacitance of parallel plates is increased by the insertion of a dielectric material.  Further, the capacitance is inversely proportional to the electric field between the plates, and hence the presence of the dielectric decreases the effective electric field.

Solve any question of Electrostatic Potential and Capacitance with:-

Was this answer helpful?

upvote 0
downvote0