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प्रश्न
The desirable properties for making permanent magnets are _________________ .
विकल्प
high retentivity and high coercive force
high retentivity and low coercive force
low retentivity and high coercive force
low retentivity and low coercive force
MCQ
रिक्त स्थान भरें
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उत्तर
high retentivity and high coercive force
Permanent magnets should have high retentivity so that the magnet is strong and high coercive force, so that magnetisation is not erased by stary magnetic fields, temperature change or due to rough handling etc.
shaalaa.com
क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
