Question: Q. 4. What is the electric flux through a cube of side $1 \mathrm{~cm}$ which encloses an electric dipole?

U [Delhi I, II, III 2015]

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Solution:

Ans. Zero (as net charge enclosed by the surface is zero.)

[CBSE Marking Scheme, 2015]

Detailed Answer :

In a cubic surface, the net electric charge will be zero since dipole carries equal and opposite charges. It is observed that the net electric flux through closed cubic surface will be

$$ =\frac{\text { Charge enclosed }}{\varepsilon_{0}} $$

and because the charge enclosed is zero,

$\therefore$ electric flux is also zero. 1



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