If the potential (relative to infinity) due to a point charge is V at a distance R from this charge, the distance at which the potential (relative to infinity) is 2V is A. 4R
B. 2R
C. R/2.
D. R/4

R/2

Explanation:

The potential at a distance r is given by :

Where

k is electrostatic constant

q is the charge

The potential (relative to infinity) due to a point charge is V at a distance R from this charge. So,

Put all the values,

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explanation: