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In a certain charge distribution, all po...

In a certain charge distribution, all points having zero potetnial can be joined by a circles `S`. Points inside `S` have positive potential and points outside `S` have negative potential. A positive charg, which is free to move, is placed inside `S`

A

It will remain in equilibrium

B

It can move inside `S`, but it cannot cross `S`

C

It must cross `S` at some time

D

It may move, but will ultimately return to its starting point

Text Solution

Verified by Experts

The correct Answer is:
C
A free positive charge move from higher (positive) potential to lower (negative) potential. Hence, it must cross `S` at some time.
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