PERMANENT MAGNETS AND ELECTRO MAGNETS

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PERMANENT MAGNETS AND ELECTRO MAGNETS
Substances which retain at their ferro-magnetic property at room temperature for a long time are called Permanent magnets. We can make the permanent magnets in different ways.
By Striking Method:
The best way to make a permanent magnet is to place a ferromagnetic rod of the solenoid and pass a current. The magnetic field of the solenoid magnetizes the rod. We can explain the permanent magnets phenomena from figure hysteresis graphs . Steel, alnico, cobalt steel is suitable for making permanent magnets.
9 سال پیش در تاریخ 1394/09/07 منتشر شده است.
18,764 بـار بازدید شده
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