Department of Pre-University Education, Karnataka course PUC Karnataka Science Class 12
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# An Electric Dipole is Placed at the Centre of a Sphere. Mark the Correct Options. - Physics

ConceptElectric Dipole

#### Question

An electric dipole is placed at the centre of a sphere. Mark the correct options.
(a) The flux of the electric field through the sphere is zero.
(b) The electric field is zero at every point of the sphere.
(c) The electric field is not zero anywhere on the sphere.
(d) The electric field is zero on a circle on the sphere.

#### Solution

(a) The flux of the electric field through the sphere is zero.
(c) The electric field is not zero anywhere on the sphere.
The sphere encloses a dipole, i.e. two equal and opposite charges. In other words, net charge enclosed in the sphere is zero. Hence, the flux is zero through the sphere.
But the electric field at any point p on the sphere,

"E" = 1/(4piε_0) "p"/"r"^3 sqrt(3 cos^2 theta +1),where θ is the angle made by the point p with the centre of the dipole.
Hence, we can see that the field is not zero anywhere on the sphere.

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#### APPEARS IN

HC Verma Solution for Concepts of Physics - Vol. 2 (2018 to Current)
Chapter 8: Gauss’s Law
MCQ | Q: 5 | Page no. 140

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Solution An Electric Dipole is Placed at the Centre of a Sphere. Mark the Correct Options. Concept: Electric Dipole.
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