CUET · PHYSICS · PYQ PAPER 2023
The desirable properties of materials for making permanent magnets are:
- A low retentivity and high coercivity
- B Iow retentivity and low coercivity
- C high retentivity and high coercivity
- D high retentivity and low coercivity
Answer & Solution
Correct Answer
(C) high retentivity and high coercivity
Step-by-step Solution
Detailed explanation
Permanent magnets must stay strongly magnetized even after the external field is removed (high retentivity) and resist being demagnetized by stray fields or heat (high coercivity). C) high retentivity and high coercivity
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