NEETPhysics-Electrostatics
NEET Physics Potential Energy MCQ Question
Type: MCQ-numerical-Hard-Class 12
Three charges Q, +q and -q are placed at the vertices of an equilateral triangle of side l as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to
A
-q/2
B
-q
C
+q
D
Zero
Correct Answer
Option A
Detailed Explanation
The net electrostatic energy is zero when the potential energy contributions from all pairs of charges cancel out. Solving gives Q = -q/2.
Found an issue with this question?
Related Questions
More from Electrostatics
A conducting sphere of radius R carrying charge Q lies inside an uncharged conducting shell of radius 2R. If they are joined by a metal wire, the amou...
2009Physics
Assertion : Electric potential of earth is taken zero. Reason : No electric field exists on earth surface.
2009Physics
The equivalent capacitance of the system shown in the following circuit is:
2023Physics