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Magnetism And Matter

Question
CBSEENPH12039786
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The magnetic susceptibility is negative for,

  • a paramagnetic material only

  • ferromagnetic material only

  • paramagnetic and ferromagnetic materials

  • diamagnetic material only

Solution

D.

diamagnetic material only

The relation between the magnetic permeability and susceptibility os material.
i.e., straight mu subscript straight r space equals space 1 space plus space straight chi subscript straight m    ... (i)
For diamagnetic susceptibility,
straight mu subscript straight r space less than thin space 1
According to equation (i), the magnetic susceptibility (straight chi subscript straight m) of diamagnetic substance will be negative.
In the case of para and ferromagnetic substances, diamagnetic susceptibility is positive.

Some More Questions From Magnetism and Matter Chapter

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The earth's magnetic field varies from point to point in space. Does it also change with time? If so, on what time scale does it change appreciably?

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The earth's core is known to contain iron. Yet geologists do not regard this as a source of the earth's magnetism. Why?

Answer the following question:
The charged currents in the outer conducting regions of the earth's core are thought to be responsible for earth's magnetism. What might be the ‘battery’ (i.e., the source of energy) to sustain these currents?

Answer the following question:
The earth may have even reversed the direction of its field several times during its history of 4 to 5 billion years. How can geologists know about the earth's field in such distant past?

Answer the following question:
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?

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