NEET Physics Magnetic Properties of Materials Assertion Reason Question
Assertion (A): Ferromagnetic materials can retain magnetisation even after the external magnetic field is removed. | Reason (R): Ferromagnetic materials contain domains that align and form a single giant domain under the influence of an external magnetic field.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT text explains that in ferromagnetic materials, domains align and amalgamate into a single giant domain, which leads to persistent magnetisation even after the external field is removed.
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