Question

19. There is non conducting sphere of radius R which
is uniformly charged. If smaller concentric sphere
of radius 5
is removed. The electric field inside
the cavity is
(1) Zero
(2) Non-zero and uniform
(3) Non-zero and non-uniform
(4) Data is insufficient​

Answer 1

Answer:

Zero

Explanation:

the electric field inside the cavity will be zero

Answer 2

The electric field at all points inside the cavity will be equal to zero.

• This can be verified using Gauss's law.
• Take a spherical gaussian surface of any radius less than the radius of the cavity which is concentric.
• The electric flux at this gaussian surface will be equal to the charge enclosed within the surface divided by epsilon.
• Since, charge enclosed is zero, the flux is zero and so is the electric field.