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Q. Electric field strength due to a diple at a point on the axial line of dipole is

J & K CETJ & K CET 2013

Solution:

$E=\frac{1}{4 \pi \varepsilon_{0}} \cdot \frac{2 P}{r^{3}}$
The direction of electric field $E$ is along the axis of the dipole from negative charge towards positive charge.