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Magnetism and Electromagnetism (Properties of a magnet (Has two poles,…
Magnetism and Electromagnetism
Properties of a magnet
Has two poles
Freely suspended magnet will always come to rest in a N-S direction
like poles repel,unlike poles attract
Repulsion is the only sure test for the polarity of the magnet
Magnetic and Non-Magnetic Materials
can be attracted
Iron,Steel,Nickel and Cobalt
cannot be attracted
Magnetic Induction
When placed near a permanent magnet
End of induced magnet nearer to permanent magnet has an opposite pole
Methods of magnetisation
Methods of demagnetisation
Magnetic properties of iron and steel
Differences between an electromagnet and a permanent magnet
Magnetic field pattern between the poles of two bar magnets
Magnetic lines of forces
Other magnetic field patterns
Magnetic effect of a current in a circuit breaker
Current-carrying conductor in a magnetic field
Turning effect of a current-carrying coil in a magnetic field