1.

Whatare permanentmagnet and electromagnent ? Givetwo uses of each .

Answer»

Solution :Magnets havinga constantmagnetic fieldaroundthem (e.g., a barmagnet ) arecalled permanentmagnets . Permanentmagnets are used in electric generators,SPEAKERS,refrigerator door etc.
Materialsbehavingas magnetn only WHENA CURRENTIS passed through a COIL would around thematerial are called electromagnet . Electromagnets are usedin electricbell ,TRANSFORMER , electriccarnes etc.


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