Electrostatics Question 431

Question: A charge (q) and another charge (+Q) are kept at two points A and B respectively. Keeping the charge (+Q) fixed at B, the charge (q) at A is moved to another point C such that ABC forms an equilateral triangle of side l. The net work done in moving the charge (q) is [MP PET 2001]

Options:

A) 14πε0Qql

B) 14πε0Qql2

C) 14πε0Qql

D) Zero

Show Answer

Answer:

Correct Answer: D

Solution:

Potential at A and C are equal. Hence work done in moving -q charge from A to C is zero.



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