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A bar magnet of magnetic moment M is bent in the form of quadrant of circular arc. The new magnetic moment is

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Important Questions on Magnetism and Matter

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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 2
The pole strength of a bar magnet is 48 A m and the distance between its poles is 25 cm. The torque, by which it can be held at an angle of 30° with the uniform magnetic field of strength 0.15 Wb m-2, will be
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 3
A small magnetic needle performs, 10 oscillations per minute in the earth's horizontal magnetic field. When a bar magnet is placed near the small magnet in the same position, the frequency of oscillations becomes, 102 oscillations per minute. If the bar magnet be turned around end to end, the rate of oscillation of small magnet will become
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 4

Two short bar magnets of magnetic moment M each are placed at a distance 2d apart. The magnetic field midway between them at P is

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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 5
A bar magnet oscillates in a region of the uniform magnetic field with time period T. Now, a piece of wood identical in all respects in terms of mass and length is joined with a bar magnet as shown. The new time period of oscillation is, 

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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 6
The period of oscillation of compass needle is 8 s at a place where dip angle is 30° and magnetic field is B1. At another place where dip angle is 60° and magnetic field is B2, the period of oscillation is 4 s then B2B1 is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 7
The magnitude of magnetic field, due to a dipole of magnetic moment 2.4 Am2, at a point 200 cm away from it in the direction making an angle of 90° with the dipole axis is
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 8
Which of the following is correct?
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Gamma Question Bank for Engineering Physics>Chapter 19 - Magnetism and Matter>Assignment Set-2>Q 10
In tanA position two short bar magnets of magnetic moments in the ratio of, 3 : 1 are placed at the same distance respectively. If the deflection produced for the first magnet be, 60° then what will be deflection for the second magnet?