NEET Physics Magnetic Properties of Materials Assertion Reason Question
Assertion (A): In a solenoid with a ferromagnetic core, the magnetic field B is enhanced compared to a solenoid with an air core.
Reason (R): The relative permeability of ferromagnetic materials is much greater than 1.
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 but R is true.
Correct Answer
Detailed Explanation
The magnetic field B in a solenoid is enhanced by a ferromagnetic core due to its high relative permeability, which increases the overall magnetic field compared to an air core. This is consistent with the calculation of B using B = μrμ0H, where μr is much greater than 1 for ferromagnetic materials.
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