1.

A circular coil of radius 10 cm and 100 turns carries a current 1 A. What is the magnetic moment of the coil ?

Answer»

`3.142 xx 10^(4) Am^(2)`
`10^(4) A m^(2)`
`3.142 A m^(2)`
`3 A m^(2)`

SOLUTION :`M = NIA = NI pi r^(2) = 10^(2) xx 1 xx 3.142 xx 10^(-2) = 3.142 Am^(2)`


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