Question

Let $E_a$ be the electric field due to a dipole in its axial a place distance l and let $E_q$ be the field in the equatorial plane distance l. The relation between $E_a$ and $E_q$ is :

• A. $E_a=E_q$
• B. $E_a=2E_q$
• C. $E_q=2E_a$
• D. $E_a=3E_q$

Answer 1

The correct option is B $E_a=2E_q$

Field at axial point=$E_a=\frac{2p}{4\pi {ϵ}_o{d}^3}$

And,field at a point in equatorial plane= $E_q=\frac{p}{4\pi {ϵ}_o{d}^3}$

Hence, $E_a=2E_q$

Answer-(B)