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An example of a diamagnetic substance is...

An example of a diamagnetic substance is

A

Aluminium

B

Copper

C

Iron

D

Nickel

Text Solution

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The correct Answer is:
B
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Diamagnetic Substances

Read the following passage and answer question on the basis of your understanding of the following passage and the related studied concepts. Diamagnetic substances are those which have tendency to move from stronger to the weaker part of the external magnetic field and a magnet would repel a diamagnetic substance. 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 slightly reduced. Each electron in an atom orbiting around nucleus is equivalent to a current carrying loop and thus possesses orbital angular moment. Diamagnetic substances are the ones in which resultant magnetic moment of all the electrons in an atom is zero. When a magnetic field is applied, those electrons having orbital magnetic moment in the same direction slow down and those in the opposite direction speed up due to induced current in accordance with lenz's law. Thus, the substance develops a net magnetic moment in a direction opposite to that of applied magnetic field and hence repulsion The most exotic diamagnetic materials are superconductors. These are metals cooled to very low temperatures and exhibit both perfect conductivity and perfect diamagnetism. This phenomenon was discovered by Meissner. Super conducting magnets can be exploited for running magnetically levitated bullet trains. Give three examples of diamagnetic substances.

Knowledge Check

  • An example of diamagnetic substance is

    A
    Mercury
    B
    Nickel
    C
    Aluminium
    D
    Oxygen

  • An example for diamagnetic substance is

    A
    Copper
    B
    Iron
    C
    Nickel
    D
    Aluminium

  • The magnetic moment of a diamagnetic substance is

    A
    Zero
    B
    1
    C
    Less than 1
    D
    Greater than 1

    • Similar Questions

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    Give some examples of paramagnetic substances.

    Diamagnetic substances are

    As per Curie's law the magnetisation of a paramagnetic substance is inversely proportional to the absolute temperature but magnetisation of a diamagnetic substance is directly proportional to the absolute temperature.

    The susceptibility of a diamagnetic substance is

    A: Above curie-point a ferromagnetic substance behaves as a paramagnetic substance. R: Magnetic susceptibility of a diamagnetic substance increases with rise in temperature.

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