Advertisements
Advertisements
प्रश्न
In what way is the behaviour of a diamagnetic material different from that of a paramagnetic, when kept in an external magnetic field?
Advertisements
उत्तर
When a bar of diamagnetic material is placed in an external magnetic field, the field lines are repelled or expelled and the field inside the material is reduced.
Whereas when a paramagnetic material is placed in an external magnetic field, the field lines are attracted towards it. Thus the field lines get concentrated inside the material and the field inside is enhanced.
APPEARS IN
संबंधित प्रश्न
Two substances A and B have their relative permeability slightly greater and slightly less than 1 respectively. What do you conclude about A and B as far as their magnetic materials are concerned?
There are three needles 'N1', 'N2' and 'N3' made of a ferromagnetic, a paramagnetic and a diamagnetic substance respectively. When a magnet is brought close to them, then it will ____________.
Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?
S is the surface of a lump of magnetic material.
- Lines of B are necessarily continuous across S.
- Some lines of B must be discontinuous across S.
- Lines of H are necessarily continuous across S.
- Lines of H cannot all be continuous across S.
Explain the Domain theory in brief.
Which substances are strongly magnetised in the direction of the magnetising field?
Which mathematical relation expresses Curie's Law for paramagnetic substances?
What happens to ferromagnetic substances on heating beyond the Curie temperature?
How are the tiny domains oriented in an unmagnetised ferromagnetic specimen?
