Physics-
General
Easy
Question
As per this diagram a point charge +q is placed at the origin O. Work done in taking another point charge -Q from the point 
[co-ordinates (0,a)] to another point B [co-ordinates (a, 0)] along the straight path AB is
- Zero
The correct answer is: Zero
Since A and B are at equal potential so potential difference between A and B is zero. Hence W = Q.DV = 0
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