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AIIMS2009PhysicsMagnetic Properties of Matter

Assertion : Magnetic susceptibillity is a pure number. Reason : The value of magnetic susceptibility for vacuum is one.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion
  3. CIf assertion is true but reason is false
  4. DIf both assertion and reason are false.

Correct answer

C. If assertion is true but reason is false

Step-by-step solution

Magnetic susceptibility ( _ m ) is defined as the ratio of the intensity (I) of magnetisation to the magnetic intensity (H) of the magnetising field, that is _m= I H It is a pure number, because I and H have the same unit. Its value for vacuum is zero as there can be no magnetisation in vacuum.

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