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Define the terms magnetic susceptibility and magnetic permeability. Derive the relation between relative magnetic permeability and magnetic susceptibility.

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 1
Suppose an isolated north pole is kept at the centre of a circular loop carrying a electric current i. The magnetic field due to the north pole at a point on the periphery of the wire is B. The radius of the loop is a. The force on the wire is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 2
If L be the length of a bar magnet then the separation between the two poles is nearly
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 3
Two identical thin bar magnets, each of length l and pole strength m, are placed at right angles to each other, with north pole of one touching the south pole of the other. The magnitude of magnetic moment of the system is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 4
A solenoid of length 10 cm and radius 1 cm contains 200 turns and carries a current of 10 A. The value of pole strength of each pole is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 5
A long magnetic needle of length 2L, magnetic moment M and pole strength m units is broken into two at the middle. The magnetic moment and pole strength of each piece will be
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 6
A bar magnet of magnetic moment M is cut two parts of equal length. The magnetic moment of either part:
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 7
A steel wire of length l has a magnetic moment M. It is then bent into a semicircular arc. The new magnetic moment is
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-2>Q 8

Two points A and B are situated perpendicular to the axis of 4 cm long bar magnet at distances x and 3x from its centre on opposite sides. The ratio of magnetic inductions at A and B will be equal to