A closely wound flat circuar coil of 25 ...

A closely wound flat circuar coil of `25` turns of wire has diameter of `10 cm` which carries current of `4 A`, the flux density at the centre of a coil will be

`1.679 xx 10^(-5)` tesla

`2.028 xx 10^(-4)` tesla

`1.256 xx 10^(-3)` tesla

`1.512 xx 10^(-6)` tesla

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