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Chapter 13: Problem 1993

Read the assertion and reason carefully to mark the correct option out of the options given below. (A) If both assertion and reason are true and the reason is the correct explanation of the assertion. (B) If both assertion and reason are true but reason is not the correct explanation of the assertion, (C) If assertion is true but reason is false. (D) If the assertion and reason both the false. (E) If assertion is false but reason is true. Assertion: Diamagnetic materials can exhibit magnetism. Reason: Diamagnetic materials have permanent magnetic dipole moment.

Short Answer

Expert verified
The correct option is (C) If assertion is true but reason is false since diamagnetic materials can exhibit magnetism, but they do not have a permanent magnetic dipole moment.

Step by step solution

01

1. Understanding Diamagnetism

Diamagnetic materials are materials that do not possess any permanent magnetic dipole moment, and they repel an external magnetic field. The magnetization of these materials is weak and opposite to the applied magnetic field direction. Diamagnetism is due to the change in the orbital motion of electrons caused by an external magnetic field, which creates an induced magnetic field.
02

2. Assertion: Diamagnetic materials can exhibit magnetism

The assertion is true. Diamagnetic materials can exhibit magnetism, but it is weak and in the opposite direction to an applied external magnetic field. When an external magnetic field is removed, the induced magnetism in the material disappears. Example: Bismuth, copper, and silver are examples of diamagnetic materials.
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3. Reason: Diamagnetic materials have a permanent magnetic dipole moment

The reason is false. Diamagnetic materials do not have a permanent magnetic dipole moment because they have paired electrons, and their intrinsic magnetic moment cancels out. The temporary magnetism in diamagnetic materials is only created because of the change in the orbital motion of electrons in response to an external magnetic field.
04

4. Choosing the correct option

Since the assertion is true, but the reason is false, we choose the correct option as (C) If assertion is true but reason is false.

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Most popular questions from this chapter

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