If $E_{a}$ be the electric field strength of a short dipole at a point on its axial line and…
If $E_{a}$ be the electric field strength of a short dipole at a point on its axial line and $E_{\mathrm{e}}$ that on the equatorial line at the same distance, then
$|E_{e}|=2 |E_{a}|$
$|E_{a}|=2 |E_{e}|$
$|E_{a}|=|E_{e}|$
None of these
Solution
$\begin{array}{l} \text {We have } |E_{a}|=\frac{2 k p}{r^{3}} \text { and } |E_{e}|=\frac{k p}{r^{3}} \text {; }\\ \therefore E_{a}=2 E_{e} \end{array}$