Current Loop as a Magnetic Dipole
Category : JEE Main & Advanced
A current carrying circular coil behaves as a bar magnet whose magnetic moment is M = NiA; Where N = Number of turns in the coil, i = Current through the coil and A = Area of the coil
Magnetic moment of a current carrying coil is a vector and it's direction is given by right hand thumb rule
(1) For a given perimeter circular shape have maximum area. Hence maximum magnetic moment.
(2) For a any loop or coil \[\overrightarrow{B}\] at centre due to current in loop, and \[\overrightarrow{M}\] are always parallel.
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