Application of Faraday’s Laws 1 (Transformers)

In the previous programme, we saw that when two coils are placed so that they are mutually coupled, a current changing in one of them causes an e.m.f. to be induced in the other one as well as in itself, and these e.m.f.s were called ‘transformer e.m.f.s’. In fact, this is the basis of the operation of the transformer which is the name given to an arrangement of coils designed to change the voltage level of electric current. It can be classified as an electrical machine, converting electric power at a high voltage, low current into electric power at a low voltage, high current or vice versa.