Advertisements
Advertisements
प्रश्न
A paramagnetic sample shows a net magnetisation of 8 Am–1 when placed in an external magnetic field of 0.6 T at a temperature of 4 K. When the same sample is placed in an external magnetic field of 0.2 T at a temperature of 16 K, the magnetisation will be ______.
विकल्प
`32/3` Am–1
`2/3` Am–1
6 Am–1
2.4 Am–1
Advertisements
उत्तर
A paramagnetic sample shows a net magnetisation of 8 Am–1 when placed in an external magnetic field of 0.6 T at a temperature of 4 K. When the same sample is placed in an external magnetic field of 0.2 T at a temperature of 16 K, the magnetisation will be `underline(2/3 Am^(–1))`.
Explanation:
i.e., `I("magnetization") oo (B("magnetic field induction"))/(t("temperature in kelvin"))`
⇒ `I_2/I_1 = B_2/B_1 xx t_1/t_2`
Let us suppose, here `I_1 = 8 Am^(-1)`
`B_1 = 0.6 T, t_1 = 4 K`
`B_2 = 0.2 T, t_2 = 16 K`
`I_2` = ?
⇒ `0.2/0.6 xx 4/16 = I_2/8`
⇒ `I_2 = 8 xx 1/12 = 2/3 Am^(-1)`
APPEARS IN
संबंधित प्रश्न
Out of the two magnetic materials, 'A' has relative permeability slightly greater than unity while 'B' has less than unity. Identify the nature of the materials 'A' and 'B'. Will their susceptibilities be positive or negative?
What happens to a ferromagnetic material when its temperature increases above curie temperature?
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.
The susceptibility of a magnetic material is positive and small. The material is ______.
A sphere of gold when brought towards a powerful magnet experiences ____________.
A domain in a ferromagnetic substance is in the form of a cube of side length 1 µm. If it contains 6 x 1010 atoms and each atomic dipole has a dipole moment of 7 x 10-24 Am2, then magnetization of the domain is ____________.
Why is diamagnetism, in contrast, almost independent of temperature?
Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a ferromagnet?
Assertion: A paramagnetic sample display greater magnetisation (for the same magnetic field) when cooled.
Reason: The magnetisation does not depend on temperature.
The magnetic susceptibility is negative for ______.
Metals getting magnetised by orientation of atomic magnetic moments in external magnetic field are called ______.
Earth's magnetic field analyses has a horizontal component except at:-
If a charged particle at rest experience no electromagnetic force
If the magnetizing field on a ferromagnetic material is increased, its permeability ______.
Magnetic susceptibility of a diamagnetic substance ______.
