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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