Advertisements
Advertisements
Question
Draw magnetic field line when a (i) diamagnetic, (ii) paramagnetic substance is placed in an external magnetic field. Which magnetic property distinguishes this behaviour of the field line due to the substances?
Advertisements
Solution
(i) The magnetic field lines, when a diamagnetic material is placed in an external magnetic field, can be diagrammatically represented as
(ii) The magnetic field lines, when a paramagnetic material is placed in an external magnetic field, can be diagrammatically represented as
Diamagnetic and paramagnetic materials are distinguished by the magnetic property called magnetic susceptibility. For diamagnetic materials, magnetic susceptibility is negative, whereas for paramagnetic materials, magnetic susceptibility is slightly positive.
APPEARS IN
RELATED QUESTIONS
Give any ‘two’ points of differences between diamagnetic and ferromagnetic substances.
Explain Curie’s law for a paramagnetic substance.
The susceptibility of a paramagnetic material is χ at 27° C. At what temperature its susceptibility be χ/3?
A rod of magnetic material of cross-section 0.25 cm2 is placed in a magnetizing field of intensity 4000 A/m-1. The magnetic flux passing through the rod is 25 × 10-6 Wb. Find out
(a) relative permeability
(b) magnetic susceptibility and
(c) magnetisation of the rod.
All atoms of a magnetic substance have a resultant magnetic moment even in absence of external magnetic field. The substance is ______.
A sphere of gold when brought towards a powerful magnet experiences ____________.
Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?
A permanent magnet in the shape of a thin cylinder of length 10 cm has M = 106 A/m. Calculate the magnetisation current IM.
- Assertion (A): Diamagnetic substances exhibit magnetism.
- Reason (R): Diamagnetic materials do not have a permanent magnetic dipole moment.
The relative magnetic permeability of a substance X is slightly less than unity and that of substance Y is slightly more than unity, then ______.
