If number of turns, area and current through a coil are given by \(...

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If number of turns, area and current through a coil are given by \( n, A \) and \( I \) respectively, then its
\( \mathrm{P} \)
magnetic moment is given by :
W
(1) \( n I A \)
(2) \( n^{2} I A \)
(3) \( n I A^{2} \)
(4) \( \frac{n I}{\sqrt{A}} \)
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