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  • Question 1
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    A loop of irregular shape carrying current is located in an external magnetic field. If the wire is flexible, why does it change to a circular shape?

  • Question 2
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    A 100 turn closely wound circular coil of radius 10 cm carries a current of 3.2 A. A uniform magnetic field of 2T in the horizontal direction exists such that initially the axis of the coil is in the direction of the field. The coil rotates through an angle of 90º under the influence of the magnetic field. What are the magnitudes of the torques on the coil in the initial and final position respectively?

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