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Physics Course/Magnet/Permanent ElectroMagnet
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Permanent Electromagnetic Magnet
A permanent magnet is an electromagnetic that does not lose its magnetic field when the current is zero
Permanent Electromagnet Properties
A magnet has two "poles" namely north pole and south pole.
The magnetic field is made up of magnetic field lines that travels from north pole to south pole
The magnetic field Strength is the product of the coil's inductance and current. B = L I
Magnet of same poles repel; different poles attract