wo positive charges of magnitude ‘q’ are placed at the ends of a side (side 1) of a square of side ‘2a’. Two negative charges of the same magnitude are kept at the other corners. Starting from rest, if a charge Q moves from the middle of side 1 to the center of square, its kinetic energy at the center of square is:
A
zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Potential at point A,
V A = 
Potential at point B,
V B = 0
∴ Using work energy theorem,
W AB ) electric = Q(V A – V B )
= 
= 
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