EASY
12th CBSE
IMPORTANT
Earn 100

Define neutral point. Locate the positions of neutral points, when a small bar magnet is placed with its north pole towards the south of the earth.

Important Questions on Magnetism

EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 1
Two magnetic south poles are located 4.0 cm apart. If the poles of each magnet have a strength of 8.0 Am and are 20.0 cm apart, find the force exerted by one south pole on the other.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 2
Two equal and unlike poles placed 5 cm apart in air attract each other with a force of 14.4×10-4 N. How far from each other should they be placed so that the force of attraction will be 1.6×10-4 N?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 3
Two magnetic poles, one of which is 10 times as strong as the other, exert on each other a force equal to 9.604 mN, when placed 10 cm apart in air. Find the strength of the two poles.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Problems For Practice>Q 4
Two like magnetic poles of strengths 5 Am and 20 Am are situated 1.0 m apart. At what point on the line joining the two poles, will the magnetic field be zero?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 36
Define the terms retentivity and coercivity.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 43

Out of the following, identify the materials which can be classified as diamagnetic:
1.Aluminium

2. Bismuth

3. Copper

4. Sodium
Write one property to distinguish between paramagnetic and diamagnetic materials.

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 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.