What Is Auto Transformer || Explanation ...

Auto Transformer :-

It is a type of Transformer , It`s working principle is same as normal transformer, which is   " FARADAY`S LAW OF ELECTOR-MAGNETIC INDUCTION " .
Which states that ;
' When a conductor is placed in a varying magnetic field, an EMF is induced which is known as Induced EMF. If the conductor circuit is closed, a current is
also induced which is known as Induced Current. It has two Windings  ;

             1.) Primary Winding ,
     2.) Secondary Winding.

In auto Transformer number of turns in primary winding is constant but we can change number of turns in the secondary winding with the help of a Rotating Disk.
So we are eligible to take output as much as we want under the capacity of the transformer.
We can represent Auto-Transformer by the following symbol :

AUTO Xmer

As we know ;

         N1/N2 = E1/E2

Means the induced voltage depends on the number of turns in the windings. We can change the output by changing the number of turns in the winding in the
Single Transformer.

VIDEO:-

Use :-

It is mainly used in laboratories in schools, colleges and research labs Because in labs we are used to work with different voltages, it is very useful
to work with An Auto-Transformer.