Question

Assertion: A metallic shield in form of a hollow shell may be built to block an electric field.
Reason: In a hollow spherical shield, the electric field inside it is zero at every point.

• A. If both assertion and reason are true but the reason is the correct explanation
  of assertion.
• B. If both assertion and reason are true but the reason is not the correct explanation
  of assertion.
• C. If assertion is true but reason is false.
• D. If both the assertion and reason are false.
• E. If reason is true but assertion is false.

Answer 1

The correct option is A If both assertion and reason are true but the reason is the correct explanation

of assertion.
The electric field cannot be nonzero in a metallic shell, hence it can be used for electric field shielding.