A circular coil of radius 20cm and 20 tu...

A circular coil of radius 20cm and 20 turns of wire is mounted vertically with its plane in magnetic meridian a small magnetic needle is placed at the centre of the coil and it is deflected through `45^@` when a current is passed through the coil horizontal componenet of earth's field is `0.37xx10^(-4)`T the current in coil is

0.6A

`6xx10^(-3)`A

0.006A

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