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Question

Two charges and are placed apart as shown. At what distances from to its right, the electrostatic potential is zero?

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A

B

C

D

, infinity

Medium

Solution

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Correct option is
D

, infinity

Let the potential be zero at point at a distance from the charge at as shown in above figure. Potential at








The other possibility is that point of zero potential may lie on produced at a distance from the charge at as shown in the figure.
Potential at







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