As per the diagram a point charge +q is placed at the origin O 
Work done in taking another point charge -Q from the point A [coordinates (0, a)] to another point B [coordinates (a, 0)] along the straight path AB is
Text Solution
Verified by ExpertsThe correct answer is:
A
Work done is equal to zero because the potential of A and B are the same
No work is done if a particle does not change its potential energy
i.e., initial potential energy 
final potential energy.
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