How the electric field due to an electric dipole is different from that of a point charge?

### Asked by Topperlearning User | 16th Apr, 2015, 01:25: PM

1. The electric field produced by a point charge at a point from the charge is given as

that is the field will fall off as inverse square of the distance.

whereas electric field due to dipole is given by

(at a point on the axis of the dipole)

(at a point on the equatorial plane)

which means that electric field falls off not as 1/y_{2} but as 1/y_{3}, so the electric field due to the dipole falls off much faster than the field due to a point charge.

2. Also, the magnitude and the direction of the dipole field depend not only on the distance y but also on the angle between the position vector and the dipole moment.

### Answered by | 16th Apr, 2015, 03:25: PM

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