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A rigid square loop of side a and carrying current I2 is lying on a horizontal surface near a long current I1 carrying wire in the same plane as shown in figure. The net force on the loop due to the wire will be:
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Important Questions on Magnetic Effects of Current and Magnetism

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Which among the following is correct regarding diamagnetic materials?
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A galvanometer can be changed into ammeter by connecting:
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A magnetic dipole in a uniform magnetic field has: (Take zero potential energy when magnetic dipole is perpendicular to magnetic field)
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An iron rod of volume 10-3 m3 and relative permeability 1000 is placed as core in a solenoid with10 turns cm-1 . If a current of 0.5 A is passed through the solenoid, then the magnetic moment of the rod will be :
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A bar magnet of magnetic moment 5 A m2 is placed in a uniform magnetic induction 3×10-5 T. If each pole of a magnet experiences a force of 2.5×10-4 N then the magnetic length of the magnet is
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The ratio of angular momentum L to the atomic dipole moment μi for hydrogen like atoms and ions is
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Magnetic moment of revolving electron of charge e and mass m in terms of angular momentum L of electron is
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A bar magnet of magnetic moment M is placed at a distance D with its axis along positive X-axis. Likewise, second bar magnet of magnetic moment M is placed at a distance 2D on positive Y-axis and perpendicular to it as shown in the figure. The magnitude of magnetic field at the origin is B=αμ04πMD3. The value of α must be (Assume D>> where l is the length of magnets)

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