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Questions  >>  CBSE XII  >>  Physics  >>  Magnetism and matter
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A compass needle free to turn in a horizontal plane is placed at the center of circulaum coil of 30 turns and radius 12cm . The coil is in a vertical plane making an angle of 45 with the magnetic medician. when the current in the coil is 0.35A the needle points west to East. Determine the horizontal component of the earth's magnetic field at the location .

3.9×104T3.9×104T3.9×105T3.9×105

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