Question:

A hollow sphere of radius 'r' encloses an electric dipole composed of two charges +q and -q. The net flux of electric field through the surface of the sphere due to the enclosed dipole is:

Updated On: Apr 3, 2025
  • \(\frac{2q}{ε_{0}}\)

  • \(\frac{2q}{ε_{0}}\)4\(\pi\)r2

  •  infinite

  •  Zero

  • \(\frac{q}{ε_{0}}\)

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The Correct Option is D

Solution and Explanation

A hollow sphere encloses an electric dipole (+q and -q charges).

Gauss's Law

\[ \Phi = \frac{Q_{enc}}{\epsilon_0} \]

Where \( Q_{enc} \) is the net charge enclosed by the surface.

For a dipole: \( Q_{enc} = (+q) + (-q) = 0 \)

Determine Electric Flux \[ \Phi = \frac{0}{\epsilon_0} = 0 \]

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Concepts Used:

Electric Dipole

An electric dipole is a pair of equal and opposite point charges -q and q, separated by a distance of 2a. The direction from q to -q is said to be the direction in space.

p=q×2a

where,

p denotes the electric dipole moment, pointing from the negative charge to the positive charge.

Force Applied on Electric Dipole