NEET Physics Magnetic Properties of Materials MCQ Question
Consider a method of making a permanent magnet by placing a ferromagnetic rod inside a solenoid and passing a current through it. Which of the following characteristics of the material would be most crucial for it to retain its magnetization effectively after the external magnetic field is removed?
High retentivity
Low coercivity
High permeability
Low hysteresis loss
Correct Answer
Detailed Explanation
The material should have high retentivity to remain magnetized after the external magnetic field is removed, as mentioned in the NCERT context.
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