| ASSERTION: In a cavity within a conductor, the electric field is zero. |
| REASON: Charges in a Conductor reside only at its surface. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
Both the assertion and reason are true and the reason is the correct explanation. It is because the charges are only at the surface of a conductor, the charge enclosed in the Gaussian surface in the cavity is zero. The field is therefore zero.
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