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NEET 2005 (AIPMT) · Electrostatic Potential Energy

Electrostatic Potential Energy question from NEET 2005 (AIPMT)

Q59NEET 2005 · AIPMTEasy

Electrostatic Potential Energy

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

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Answer: (a)

B is at $(a, 0)$ , so $OA = OB = a$ .
$V_A = V_B = \dfrac{kq}{a}$ , so $W = -Q(V_B - V_A) = 0$ .
So the answer is (a) zero.

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