Magnetic Fields

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A magnetic field is a region where magnetic materials (like iron and steel) and also wires carrying currents experience a force acting on them. 

A magnetic field can be identified by using iron fillings and they're invisible to the eye.

The magnetic field around a current carrying wire is created when the current flows through the wire. The field is made up of concentric circles with the wire in the centre. 

The magnetic field round a coil of wire - the magnetic field inside a coul of wire (a solenoid) is strong and uniform. Outside the coil the magnetic field is just like the…

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