Concepts Of Physics MCQ Edition [Volume 2]PhysicsMagnetic Properties of Matter
At the centre of a long solenoid carrying a current of 2.0 A , the magnetic intensity H is measured to be 1500 A m ⁻¹ . A rod is inserted as the core in the solenoid, and the magnetization I of the core is found to be 0.12 A m ⁻¹ . Identify whether the material of the rod is paramagnetic, diamagnetic, or ferromagnetic.
Options
- AFerromagnetic
- BAntiferromagnetic
- CParamagnetic
- DDiamagnetic
Correct answer
C. Paramagnetic
Step-by-step solution
The magnetic susceptibility of a material is defined as the ratio of its magnetization I to the magnetic intensity H . = I H Substituting the given values: = 0.12 1500 = 8 10⁻⁵ Since the magnetic susceptibility is a small positive value, the material of the rod is paramagnetic.