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A permanent magnet cannot be used in electrical bell .Why?​
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A permanent magnet cannot be used in electrical bell .Why?​

User Sjay
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2 votes
what he said, yup!! ^^^
User Federico Giorgi
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6 votes

Answer:

we can not use permanent magnets in radio and electric bells , because permanent magnets loose their property after some time whereas we can change the properties of electromagnet.

User Ferdane
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