NEET Physics Electric Dipole MCQ Question
An electric dipole consists of charges +q and -q separated by a distance 2a. What is the magnitude of the electric field at a point on the axis of the dipole at a distance r from the center of the dipole, assuming r is much greater than a?
E = (1/4πε₀) * (2qa/r³)
E = (1/4πε₀) * (2q/r²)
E = (1/4πε₀) * (q/2r³)
E = (1/4πε₀) * (qa²/r²)
Correct Answer
Detailed Explanation
The electric field on the axis of a dipole at a far distance r is given by E = (1/4πε₀) * (2qa/r³), where p = 2qa is the dipole moment.
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