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Show how a current loop acts as a magnetic dipole . Arrive at an expression for the magnetic dipole moment. |
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Answer» Solution :Consider a plane loop of WIRE carrying a CURRENT .I. as shown in figure . Looking at the FACE, the current is clockwise and so it has a south POLARITY . Thus the current loop behaves as a magnetic dipole . If A is the AREA of the plane of the loop, then dipole moment M = IA For n such turns , M = nIA S.I unit of M is `A.m^2` 
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