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A bar magnet of magnetic moment 5.0 A m2 has poles 20 cm apart. Calculate the pole strength.

Important Questions on Magnetism and Matter

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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 28
Three identical specimens of magnetic materials nickel, antimony and aluminium are kept in a non uniform magnetic field. Draw the modifications in the field lines in each case.
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 30

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

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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: