A short electric dipole has a dipole moment of 16 × 10-9 Cm. The… | NEET 2020 (Phase 1)

Q58NEET 2020 · PHASE 1Easy

Electric Dipole

A short electric dipole has a dipole moment of 16 $\times$ 10-9 Cm. The electric potential due to the dipole at a point at a distance of 0.6 m from the centre of the dipole, situated on a line making an angle of $60^\circ$ with the dipole axis is:

$\left(\frac{1}{4\pi\varepsilon_0} = 9 \times 10^{9}\text{ Nm}^2/\text{C}^2\right)$

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Answer: (a)

Potential of a short dipole: $V = \frac{kp\cos\theta}{r^2}$
$V = \frac{9\times10^9\times16\times10^{-9}\times0.5}{0.36} = \frac{72}{0.36}$
$V = 200$ V, answer (a).

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