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A bar magnet of magnetic moment M is gently placed inside the two mutually perpendicular magnetic field BV=6 T and BH=2 T as shown in figure. The net torque on the bar magnet will be zero

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 11
A bar magnet of magnetic moment M is hung by a thin cotton thread in a uniform magnetic field B→. Work done by the external agent to rotate the bar magnet from stable equilibrium position to 120° with the direction of magnetic field is (consider change in angular speed is zero)
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 12
At a place, apparent dip angle is 60°, when the plane of the dip circle is at an angle of, 30° with the magnetic meridian. The true dip at that place is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 13
Which one of the following is not considered as element of earth's magnetic field?
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 14
A short bar magnet having magnetic moment M=0.80 J T-1 is placed in uniform magnetic field of 0.30 T. If bar magnet is free to rotate in plane of field, then (Where U is potential energy and τ is torque)
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 15
A short bar magnet of magnetic moment 53×10-2JT-1 is placed with its axis normal to the earth's horizontal magnetic field. The distance from the centre of magnet, at its equatorial position, where the resultant field makes an angle 60° with earth's horizontal field is BH=0.4×10-4 T
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment>Q 14
A magnetic needle is suspended parallel to a magnetic field. The work require to turn it through 60° is 12 J. The torque require to maintain the needle in this position will be
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment>Q 3
Two short bar magnets of magnetic moments M each are arranged at the opposite comers of a square of side d such that their centres coincide with the corners and their axes are parallel. If the like poles are in the same direction, the magnetic induction at any of the other comers of the square is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment>Q 4

The magnetic moment of the arrangement shown in the figure is

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