Question

For a short dipole, the ratio of the electric field on the axial line to that on the equatorial line (at the same distance r) is:

विकल्प

• 1/2

• 2

• 4

• 1

Answer 1

The electric field on the axial line is \[E_{axial} = \frac{2p}{4\pi\varepsilon_0 r^3}\], while on the equatorial line it is \[E_{eq} = \frac{p}{4\pi\varepsilon_0 r^3}\]. Therefore, the ratio is \[E_{axial} = 2E_{eq}\], which means the axial field is twice as strong as the equatorial field at the same distance from the dipole.