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Concepts Of Physics MCQ Edition [Volume 2]
Exam
Concepts Of Physics MCQ Edition [Volume 2]
Subject
Physics
Chapter
Magnetic Properties of Matter

Concepts Of Physics MCQ Edition [Volume 2] · Physics · Magnetic Properties of Matter

At the centre of a long solenoid carrying a current of 2.0 A , the...

At the centre of a long solenoid carrying a current of 2.0 A2.0 \text{ A}, the magnetic intensity HH is measured to be 1500 A m−11500 \text{ A m}^{-1}. A rod is inserted as the core in the solenoid, and the magnetization II of the core is found to be 0.12 A m−10.12 \text{ A m}^{-1}. Identify whether the material of the rod is paramagnetic, diamagnetic, or ferromagnetic.

Options

  1. AFerromagnetic
  2. BAntiferromagnetic
  3. CParamagnetic
  4. DDiamagnetic

Correct answer

C. Paramagnetic

Step-by-step solution

The magnetic susceptibility χ\chi of a material is defined as the ratio of its magnetization II to the magnetic intensity HH.

χ=IH\chi = \dfrac{I}{H}

Substituting the given values:

χ=0.121500=8×10−5\chi = \dfrac{0.12}{1500} = 8 \times 10^{-5}

Since the magnetic susceptibility χ\chi is a small positive value, the material of the rod is paramagnetic.
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