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A 515- turn circular loop coil with a diameter of 16.6 cm isinitially aligned so that its plane is perpendicular to the Earth'smagnetic field. In 2.04 ms the coil is rotated 90.0o sothat its plane is parallel to the Earth's magnetic field. Anaverage emf of .1 V is induced in the coil What is the value of the Earth's magnetic field.

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