Permeability of Ferromagnetic Materials – Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

Assertion (A): Permeability of a ferromagnetic material is independent of the applied magnetic field. Reason (R): Permeability of ferromagnetic substances is lower for higher value of applied field.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

Permeability \(\mu\) of ferromagnetic materials is highly dependent on the applied field and exhibits hysteresis, making Assertion (A) false. While permeability decreases at very high fields due to saturation, it initially increases. So, Reason (R) is not universally true. Therefore, both Assertion (A) and Reason (R) are false.

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