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A flat circular coil of wire 8.4 in diam...

A flat circular coil of wire `8.4` in diameter has 28 turns of copper wire and carries a current of `3.6` A . If his coil is placed in a uniform magnetic field of `0.25` T . (a) what is the magnitude of the magnetic dipole moment and (b) how much energy is required to turn the coil from its stable equilibrium position through an angle of `180^(@)` ?

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The correct Answer is:
`0.558 Am^(2) , 0.279 J `
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