| Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: |
| Assertion (A): No work is done in taking a positive charge from one point to other inside a positively charged metallic sphere while outside the sphere work is done in taking the charge toward the sphere. |
| Reason (R): Inside the sphere electric potential is same at each potential, but outside it is different for different points. |
A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)
B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)
C) Assertion (A) is true but Reason (R) is false
D) Assertion (A) is false and Reason (R) is also false
Correct Answer: A
Solution :
(a) Inside the charged metallic sphere every point is at the same electric potential, hence \[W=q\,\Delta V=O\]. But outside the sphere, there exists a potential gradient at every point, hence\[W\ne O\].
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