AIPMT PRELIMS2007Physics-Electrostatics
AIPMT PRELIMS 2007 Physics Electric Potential and Work Done MCQ Question
Type: MCQ-numerical-Hard-Class 12
Charges +q and –q are placed at points A and B respectively which are a distance 2L apart, C is the midpoint between A and B. The work done in moving a charge +Q along the semicircle CRD is
A
qQ/2πε₀L
B
qQ/6πε₀L
C
-qQ/6πε₀L
D
qQ/4πε₀L
Correct Answer
Option C
Detailed Explanation
The work done in moving a charge in an electric field is given by the change in potential energy. Since the path is along an equipotential surface, the work done is zero. However, considering the potential difference, the correct calculation gives -qQ/6πε₀L.
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