NEET2013Physics-Electrostatics
NEET 2013 Physics Electric Dipole MCQ Question
Type: MCQ-conceptual-Medium-Class 12
An electric dipole of dipole moment p is aligned parallel to a uniform electric field E. The energy required to rotate the dipole by 90° is:
A
p²/E
B
pE
C
infinite
D
pE²
Correct Answer
Option B
Detailed Explanation
The work done in rotating the dipole from 0° to 90° is given by W = pE(¹⁻ cosθ). For θ = 90°, W = pE.
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