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Q.
If $E_{1}$ be the electric field strength of a short dipole at a point on its axial line and $E_{2}$ that on the equatorial line at the same distance, then
AMUAMU 2004
Solution:
The electric field strength in end on position, is given by
$E_{1}=\frac{1}{4 \pi \varepsilon_{0}} \cdot \frac{2 p}{d^{3}}$ ...(i)
Electric field strength on broad side on position or on equatorial position is
$E_{2}=\frac{1}{4 \pi \varepsilon_{0}} \frac{p}{d^{3}}$ ...(ii)
From Eqs. (i) and (ii), we get
$\frac{E_{1}}{E_{2}}=\frac{2}{1}$
$\Rightarrow E_{1}=2 E_{2}$