Electrostatics Question 789

Question: A system of three positive charges placed at the verticals of and equilateral triangle. To decrease the potential energy of the system,

Options:

A) a positive charge should be placed at centroid.

B) a negative charge should be placed at centroid.

C) distance between the charges should be decreased.

D) it should be rotated by an angle of $ \frac{\pi }{2} $ radian.

Show Answer

Answer:

Correct Answer: C

Solution:

[c] Potential energy decreases whenever there is attraction. A negative charge placed at centroid causes attraction.



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