Two equal positive charges are kept at points A and B. The electric potential, while moving from A to B along straight line:
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the two charges at A & B are separated by distance 2 r.
Let us consider a general point ‘M’ at distance
‘x’ from point ‘A’ in figure.
∴ V m = Potential at M = 
+ 
∴ V m = 
kQ = kQ 
For Vm to be max. or min:
= 0
or 
∴ 
= 0
∴ x = r
& At x = r, 
∴ x = r is min.
Hence potential continuously decreases from A to P and then increases
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