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IMPORTANT
Earn 100

Distinguish between diamagnetic and ferromagnetic substances in respect of (i) intensity of magnetisation, (ii) behaviour in a non-uniform magnetic field and (iii) susceptibility.

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 51
If actual angle of dip at a place is δ and δ1, δ2 are apparent angles of dip in two mutually perpendicular planes, then prove that cot2δ=cot2δ1+cot2δ2.
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 52
A compass needle having magnetic moment 40 A m2 is pointing towards north at a place where horizontal component of earth magnetic field is 80μWb m-2 If torque acting on the needle is 1.6×10-3 N-m, then calculate angle of dip at the place.
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 52
What properties should be present in a material which can be used as permanent magnet?
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 53
A solenoid of 500  turns per meter is carrying current of 3 A. Its core is made of iron, which has a relative permeability of 5000. Determine the magnitude of magnetic intensity, intensity of magnetisation and magnetic field inside the core.
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 54
The magnetic field due to a very small magnet at a point is perpendicular to magnetic moment. Find the angle made by the line joining centre of magnet to the point and magnetic moment of bar magnet.
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 55
What is magnetic shielding? How can a space be shielded from magnetic fields?
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 56
What is pole strength of a bar magnet if its magnetic dipole moment is 4×10-2 A-m2 and separation between two poles in 5 cm?
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Gamma Question Bank for Medical Physics>Chapter 20 - Magnetism and Matter>Assignment Set-1>Q 57
The work done in turning a magnet of magnetic dipole moment M by 90° from its stable equilibrium position is n times the corresponding work done to turn it through an angle of 60°. Find value of n.