transformers are electrical devices
consisting of two or more coils of wire
used to transfer electrical energy by
means of a changing magnetic field one
of the main reasons that we use
alternating AC voltages and currents in
our homes and workplaces is that AC
supplies can be easily generated at a
convenient voltage transformed into much
higher voltages and then distributed
around the country using a national grid
of pylons and cables over very long
distances the reason for transforming
the voltage to a much higher level is
that prior distribution voltages imply
lower currents for the same power these
higher AC transmission voltages and
currents can then be reduced to a much
lower safer and usable voltage level
where it is can be used to supply
electrical equipment in our homes and
workplaces and all this is possible
thanks to the basic voltage transformer
the voltage transformer can be thought
of as an electrical component rather
than an electronic component a
transformer basically is a very simple
static electromagnetic passive
electrical device that works on the
principle of Faraday's law of induction
by converting electrical energy from one
value to another the transformer does
this by linking together two or more
electrical circuits using a common
oscillating magnetic circuit which is
produced by the transformer itself a
transformer operates on the principles
of electromagnetic induction in this
form of mutual induction mutual
induction is the process by which a coil
of wire magnetically induces a voltage
into another coil located in close
proximity to it then we can say that
transformers work in the magnetic domain
and transformers get their name from the
fact that they transform one voltage or
current level into another
