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A compass needle free to turn in a horizontal plane is placed at the centre...

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Physics

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A compass needle free to turn in a horizontal plane is placed at the centre of a circular coil of 30 turns and radius 12 cm The coil is in a vertical plane making an angle of 45 with the magnetic meridian The needle points west to east when the current in the coil is 0 35 A The horizontal component of the earth s magnetic field in T at that location is A 3 9 x 10 5 Correct Answer 3 9 10 6 5 x 10 5 10

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