EASY
12th CBSE
IMPORTANT
Earn 100

Explain the phenomenon of hysteresis in magnetic materials. Draw a hysteresis loop showing remanence and coercive force.

Important Questions on Magnetism

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 37
In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 38
Draw a hysteresis loop with axes labelled and showing remanence and coercive force. What does the area of the loop represent?
MEDIUM
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 39
An electron of mass me revolves around a nucleus of charge +Ze. Show that it behaves like a tiny magnetic dipole. Hence prove that the magnetic moment associated with it is expressed as μ→=-e2 meL→ where L→ is the orbital angular momentum of the electron. Give the significance of negative sign.
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 40
Permanent magnets are made of special alloys while the cores of temporary magnets are made of soft iron. Why?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 41
Depict the field-line pattern due to a current carrying solenoid of finite length. In what way do these lines differ from those due to an electric dipole?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 41
Depict the field-line pattern due to a current carrying solenoid of finite length. Why can't two magnetic field lines intersect each other?
EASY
12th CBSE
IMPORTANT
New Simplified Physics (Vol 1) For Class 12>Chapter 5 - Magnetism>Text Based Exercises>Q 42
Write two properties of a material suitable for making (a) a permanent magnet, and (b) an electromagnet.