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A rigid square loop of side and carrying current is lying on a horizontal surface near a long current carrying wire in the same plane as shown in figure. The net force on the loop due to the wire will be:


(a)Attractive and equal to
(b)Repulsive and equal to
(c)Repulsive and equal to
(d)Zero

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Important Questions on Magnetic Effects of Current and Magnetism
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A bar magnet of magnetic moment is placed at a distance with its axis along positive -axis. Likewise, second bar magnet of magnetic moment is placed at a distance on positive -axis and perpendicular to it as shown in the figure. The magnitude of magnetic field at the origin is . The value of must be (Assume where is the length of magnets)
