COMEDK · Physics · 20. Magnetic Properties of Matter
The material selected for making a permanent magnet should have:
- A Low coercivity, low permeability and low retentivity
- B High coercivity, high permeability and high retentivity
- C High coercivity, low permeability and high retentivity
- D Low coercivity, low permeability and high retentivity
Answer & Solution
Correct Answer
(B) High coercivity, high permeability and high retentivity
Step-by-step Solution
Detailed explanation
For a material to be used as a permanent magnet, it must possess the following properties: High retentivity: This ensures that the magnet is strong and retains a large amount of magnetization even after the external magnetizing field is removed. High coercivity: This ensures…
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