What is a Electromagnetic induction and the purpose of it?
Electromagnetic inductions is used for a few different things. One of the major things it is used for is producing electricity. This is done by passing a conductor through a magnetic field. This is achieved by having large coils of wire and essentially a large electromagnet spinning inside it. The magnet is usually turned by some sort of prome mover – a turbine for example. This is a process of converting mechanical energy into electrical energy. Electromagnetic induction is also used for converting voltages. For example in a simple transformer, and high frequency oulsating dc wave or an ac wave can be used to produce an oscillating magnetic field, which in turn will induce an EMF into the secondary coil of the transformer. Modern transformers are very good at doing this and there are very little losses (eddy currents etc) and there are no moving mechanical parts to the transformer, meaning that they are very reliable.
