MEDIUM
12th CBSE
IMPORTANT
Earn 100

Distinguish the magnetic properties of a dia, para and ferromagnetic substances in terms of
magnetic permeability
Give one example of each of these materials.
Draw the field lines due to an external magnetic field near a (i) diamagnetic, (ii) paramagnetic substance.

Important Questions on Magnetism

MEDIUM
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 4
Distinguish the magnetic properties of a dia, para and ferromagnetic substances in terms of
coercivity.
Give one example of each of these materials.
Draw the field lines due to an external magnetic field near a (i) diamagnetic, (ii) paramagnetic substance.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 5
How does a paramagnetic material behave in the presence of an external magnetic field? Explain with the help of an appropriate diagram.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 5
What happens when the temperature of a paramagnetic sample is lowered?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 5
To which of the two - a polar dielectric or a non-polar dielectric - does a paramagnetic material correspond? Justify your answer.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 6
A small compass needle of magnetic moment 'm' is free to turn about an axis perpendicular to the direction of uniform magnetic field 'B'. The moment of inertia of the needle about the axis is 'I'. The needle is slightly disturbed from its stable position and then released. Prove that it executes simple harmonic motion. Hence deduce the expression for its time period.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 6
A compass needle, free to turn in a vertical plane orients itself with its axis vertical at a certain place on the earth. Find out the values of (i) horizontal components of earth's magnetic field and (ii) angle of dip at the place.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 7
An electron in the ground state of Hydrogen atom is revolving in a circular orbit of radius R. Obtain the expression for the orbital magnetic moment of the electron in terms of fundamental constants.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 7

Draw the magnetic field lines for a current carrying solenoid when a rod made of (i) copper, (ii) aluminium and (iii) iron, is inserted within the solenoid as shown.

Question Image