A wire of length `L metre ` , carrying a current `I `ampere is bent in the form of a circle . The magnitude of its magnetic moment is …………. ` MKS units ` .
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B, D
Wire of length `L` is bent in the form of a circle . Then perimeter of the circle ` 2pir = L ` rArr ` r= (L)/(2 pi) :. Area of the circle ` = pir^(2) = (piL^(2))/( 4 pi^(2)) = ( L^(2))/(4 pi)` Magnetic moment of a loop in which current `i` flows is given by ` M = iA = (iL^(2))/(4 pi)`
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