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The coil of moving coil galvanometer twi...

The coil of moving coil galvanometer twists through `90^@` when a current of one micro ampere is passed through it. If the area of the coil is `10^(-4) m^2` and its has 100 turns ,calculate the magnetic field of the magnet of the galvanometer, [ Given `C=10^(-8) Nm`/ degree ]

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