Assertion : Diamagnetism is universal, it is present in all materials.
Reason : Field due to induced magnetic moment is opposite to the magnetising field

If both assertion and reason are true and reason is the correct explanation of assertion.

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If both assertion and reason are true and reason is not the correct explanation of assertion.

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If assertion is true but reason is false.

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If both assertion and reason are false

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Solution

The correct option is D If both assertion and reason are false
The magnetic material can be classified as
Diamagnet
Paramagnet
ferromagnet
According to the induced magnetic field inside due to keep in the external magnetic field. But when induce magnetic field is oppose the external magnetic field then nature of magnetic material is Diamagnet.
Here Assertion is wrong then the Reason wrong as well.
Option D

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Similar questions

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.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

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