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प्रश्न
Core of elctromagnets are made of ferromagnetic materials which have ______.
विकल्प
- low permeability and low retentivity
- high permeability and high retentivity
- high permeability and high retentivity.
- low permeability and high retentivity.
MCQ
रिक्त स्थान भरें
उत्तर
Core of elctromagnets are made of ferromagnetic materials which have high permeability and high retentivity.
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