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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Why is diamagnetism, in contrast, almost independent of temperature?

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प्रश्न

Why is diamagnetism, in contrast, almost independent of temperature?

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उत्तर

Each molecule of the diamagnetic material is not a magnetic dipole in itself. Hence, the random thermal motion of the molecules of the diamagnetic material (which is related to the temperature) does not affect the diamagnetism of the material.

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अध्याय 5: Magnetism and Matter - Exercise [पृष्ठ २०२]

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एनसीईआरटी Physics Part I and II [English] Class 12
अध्याय 5 Magnetism and Matter
Exercise | Q 5.16 (b) | पृष्ठ २०२

संबंधित प्रश्न

Which of the following substances is ductile?


Give any ‘two’ points of differences between diamagnetic and ferromagnetic substances.


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?


Answer in brief.

Discuss the Curie law for paramagnetic material.


The magnetic susceptibility of a paramagnetic material at - 73 °C is 0.0075. Its value at -173 °C will be ______.


All atoms of a magnetic substance have a resultant magnetic moment even in absence of external magnetic field. The substance is ______.


The magnetic property of magnetic substance is associated with ____________.


Above the curie temperature the susceptibility of ferromagnetic substance varies ____________.


The earth’s field departs from its dipole shape substantially at large distances (greater than about 30,000 km). What agencies may be responsible for this distortion?


Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher fields?


The given figure represents a material which is ______.


If a diamagnetic substance is brought near north or south pole of a bar magnet, it is ______.

A material is placed in a magnetic field and it is thrown out of it. Then the material is ______.

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 ______.


Essential difference between electrostatic shielding by a conducting shell and magnetostatic shielding is due to ______.

  1. electrostatic field lines can end on charges and conductors have free charges.
  2. lines of B can also end but conductors cannot end them.
  3. lines of B cannot end on any material and perfect shielding is not possible.
  4. shells of high permeability materials can be used to divert lines of B from the interior region.

Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively ______.


Which of the following has a permeability less than that of free space?


Which of the following cannot modify an external magnetic field as shown in the figure?

 


Explain ferromagnetism on the basis of the domain theory.


Match List-I with List-II.

  List-I (Material)   List-II (Susceptibility)
A. Diamagnetic I. χ = 0
B. Ferromagnetic II. 0 > χ ≥ −1
C. Paramagnetic III. χ >> 1
D. Non-magnetic IV. 0 < χ < ε

Choose the correct answer from the options given below:


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