For the formation of permanent magnets, the material should have
Correct answer: A. High coercivity
- A. High coercivity
- B. Low coercivity
- C. Low retentivity
- D. Both (a) and (c)
Explanation
A permanent magnet must be able to resist demagnetizationfrom external fields. This property is called coercivity, and ahigh coercivity is essential for a magnet to maintain itsmagnetism over time.
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About Physics of Solids
Solids are compared through crystal structure, amorphous arrangement, elasticity, plastic deformation, stress, strain and Young’s modulus. Electrical behavior depends on available charge carriers and band structure, so conductors, insulators and semiconductors must be distinguished from mechanical properties such as strength, stiffness and brittleness.
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