A permanent magnet has the properties of retentivity and coercivity, which in magnitude are respectively
Correct answer: A. High-high
- A. High-high
- B. Low-low
- C. Low-high
- D. High-low
Explanation
To be a strong and lasting magnet, a material must havehigh retentivity (to retain a strong magnetic field) and highcoercivity (to resist being demagnetized by external fields ortemperature changes).
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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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