The following figure shows the variation of intensity of magnetisation versus the applied magnetic field intensity, H, for two magnetic materials A and B:

(a) Identify the materials A and B.
(b) Why does the material B, have a larger susceptibility than A, for a given field at constant temperature?

Solution

(a) Material A is diamagnetic.
Material B is paramagnetic.

Because, susceptibility, $χ = \frac{I}{H}$ .
The slope of the given graph would give us the susceptibility. Slope of A is less than B. Therefore, A is diamagnetic and B is paramagnetic.

(b) Material B is paramagnetic and has a greater value of susceptibility because, paramagnetic substances have a tendency to pull in magnetic field lines when placed in a magnetic field.

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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?

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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?

A bar magnet of magnetic moment 1.5 JT^–1 lies aligned with the direction of a uniform magnetic field of 0.22 T.
(a) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction, (ii) opposite to the field direction?
(b) What is the torque on the magnet in cases (i) and (ii)?

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Magnetism And Matter

The following figure shows the variation of intensity of magnetisation versus the applied magnetic field intensity, H, for two magnetic materials A and B:

(a) Identify the materials A and B.
(b) Why does the material B, have a larger susceptibility than A, for a given field at constant temperature?

Some More Questions From Magnetism and Matter Chapter

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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Entrance Exams Preparation

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Magnetism And Matter

The following figure shows the variation of intensity of magnetisation versus the applied magnetic field intensity, H, for two magnetic materials A and B:(a) Identify the materials A and B.(b) Why does the material B, have a larger susceptibility than A, for a given field at constant temperature?

Some More Questions From Magnetism and Matter Chapter

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?

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation

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?