Electric Field due to Dipole...

Electric Field due to Dipole

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The electric field due to a dipole at a distance on its axis is

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Knowledge Check

The electric field due to a dipole at a distance r from its centre is proportional to

A

`(1)/(r^(3))`

B

`r^(3)`

C

`r^(2)`

D

`(1)/(r^(2))`

The locus of the points (in the xy -plane) where the electric field due to a dipole (dipole axis is along x -axis and its equatorial is along y -axis) is perpendicular to its axis, is

A

straight line perpendicular to the axis

B

circle

C

Parabola

D

straight line having inclination `theta= tan^(-1)sqrt(2)` with the axis.

Let E_(a) be the electric field due to a dipole it its axial plane distance l and let E_(q) be the field in the equatorial plane distance l cancelc , then the relation between E_(a) and E_(q) will be

A

`E_(a)=4E_(q)`

B

`E_(q)=2E_(a)`

C

`E_(a)=2E_(q)`

D

`E_(q)=3E_(a)`

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Starting from Eq. 24-54 derive the expression for the electric field due to a dipole at a point on the dipole axis.

Find the locus of points where the electric field due to a dipole is (i) perpendicular to its axis , (ii) anti-parallel to the axis . [Hint : "tan" alpha = ("tan"theta)/(2) ]

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Electric field due to an electric dipole is

Electric field due to an electric dipole is