1.

A thin circular loop carryinga current has a radius 100 mm and magnetic induction at its centre is 6.0 mutthen magnetic moment ofthe loop is

Answer»

`15 ma -m^(2)`
`30 ma -m^(2)`
`45 ma-m^(2)`
`60 ma-m^(2)`

Solution :Here `B=(mu_(0))/(4pi)(2pil)/(R )`
`(because IpiR^(2)=M)`
`THEREFORE B=30 mA -m^(2)`


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