| Assertion (A): In a cavity in a conductor, the electric field is zero. |
| Reason (R): Charges in a conductor reside only at its surface. |
A) Both A and R are true and R is the correct explanation of A
B) Both A and R are true but R is NOT the correct explanation of A
C) A is true but R is false
D) A is false and R is
Correct Answer: A
Solution :
| Option [a] is correct |
| Explanation: The charge enclosed by the Gaussian surface surrounding the cavity is zero. Hence, the electric field is also zero. So, the assertion is true. |
| Charges in a conductor reside only at its surface. So, in cavity there is no charge. So, the reason is also true and properly explains the assertion. |
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