TS EAMCET · Physics · Magnetic Properties of Matter
Which of the following is desirable for making permanent magnets?
- A Low coercive field and low retentivity
- B Low coercive field and high retentivity
- C High coercive field and high retentivity
- D High coercive field and low retentivity
Answer & Solution
Correct Answer
(C) High coercive field and high retentivity
Step-by-step Solution
Detailed explanation
The material used for making permanent magnet must have high retentivity, so that it produces a strong magnetic field and must have high coercivity, so that its magnetisation is not destroyed by stray magnetic fields, temperature variations or minor mechanical damage.
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