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Physics-Electric Field

NEET Physics Electric Field MCQ Question

Type: MCQ-numerical-Hard-Class 12

A point dipole with dipole moment pp is placed at the origin of a coordinate system. What is the magnitude of the electric field due to this dipole at a point located at a distance rr on the axial line of the dipole, where r≫ar \gg a?

A

2p4πε0r3\frac{2p}{4 \pi \varepsilon_0 r^3}

B

p4πε0r3\frac{p}{4 \pi \varepsilon_0 r^3}

C

2p4πε0r2\frac{2p}{4 \pi \varepsilon_0 r^2}

D

p4πε0r2\frac{p}{4 \pi \varepsilon_0 r^2}

Correct Answer

Option A

Detailed Explanation

According to the NCERT context, the electric field due to a point dipole on the axial line is 2p4πε0r3\frac{2p}{4 \pi \varepsilon_0 r^3} for r≫ar \gg a.

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