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Electric Charges and Fields
Electric Dipole – Field at Large Distance
1 question, with its answer.
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Two point charges $-q$ and $+q$ are placed at a distance of $L$, as shown in the figure [add image]. The magnitude of electric field intensity at a distance $R$ ($R\gg L$) varies asThe two charges form an electric dipole. At a large distance ($R \gg L$): $E = \frac{kp}{R^3}\sqrt{1 + 3\cos^2\theta}$ $\therefore E \propto \frac{1}{R^3}$
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