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For a current loop we can define magnetic moment mu .

Answer»

`mu` is a vector quantity
`mu` is a scalar quantity
Direction of `mu` is perpendicular to the PLANE of COIL
Direction of `mu` depends on the direction of the current

Solution :Magnetic moment is a vector quantity and its magnitude is given by NiA, where N is the number of turns. I is current and A is the area of coil. Direction of magnetic moment is perpendicular to the plane of coil, ACCORDING to the right hand rule. If you curl the right hand fingers in the SENSE of current, then the THUMB points in the direction of the magnetic moment of coil.


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