NEETPhysics-Electrostatics
NEET Physics Electrostatic Potential Energy MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Three charges Q, +q and +q are placed at the vertices of a right-angled isosceles triangle as shown. The net electrostatic energy of the configuration is zero if Q is equal to
A
-q√2 / (¹⁺ √2)
B
-2q / (²⁺ √2)
C
-2q
D
+q
Correct Answer
Option A
Detailed Explanation
The electrostatic energy is zero when the potential energy due to all charges cancels out. By symmetry and calculation, Q must be -q√2 / (¹⁺ √2) to achieve this.
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