the inductance of a closed-packed coil o...

the inductance of a closed-packed coil of `400` turns is `8mH`. `A` current of `5mA` is passed through it. The magnetic flux through each turn of the coil is

`(1)/(4pi) mu_(0)Wb`

`(1)/(2pi) mu_(0)Wb`

`(1)/(3pi) mu_(0)Wb`

`0.4 mu_(0)Wb`

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