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(a) Write the expression for the equival...

(a) Write the expression for the equivalent megnetic moment of a planer current loop of area A, having N turns and carrying a current i. Use the expression to find the magentic dipole moment of a revolving electron ?
(b) A circuit loop of radius r, having N turns and carrying current I, is kept in the XY plane. It is then subjected to a uniform magnetic field `vec(B)=B_(x)hat(i)+B_(y)hat(j)+B_(z)hat(k)` . Obtain expression for the magnetic potential energy of the coil-magnetic field system.

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