2. Give reasons: (U,Ap)
a. A magnet cnnot be used instead of electromagnet.
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1
Explanation:
A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. ... An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it.
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1
Answer:
No 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.
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