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a coil of 1200 turns and mean area of 50...

a coil of `1200` turns and mean area of `500 cm^(2)` is held perpendicular to a uniform magnetic field of induction `4 xx 10^(-4) T`. The resistance of the coil is `20` ohms. When the coil is rotated through `180^(@)` in the magnetic field in `0.1` seconds the average electric current (in `mA`) induced is :

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