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Question

Explain axial field or electric field at a point in end-on position, i.e. the axial position of an electric dipole.


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Solution

Step 1: To Find

Axial field or electric field at a point in end-on position.

Step 2: Calculate the axial field.

Let,

The charge of the electric dipole be q and length be 2d.

The electric field is at an axial point P which is at a distance r from the center of the dipole.

EP=E+-E-=Kqr-d2-Kqr+d2=Kqr+d2-r-d2r-d2r+d2=Kq4rdr-d2r+d2=2Kprr-d2r+d2

Where, p=2qd (Dipole moment).


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