What is a transformer? What is its structure and principle of operation?
A transformer is an electrical device that allows several times to increase or decrease an alternating voltage with virtually no loss of power. It consists of two inductively coupled windings (on a solid core) One is connected to an alternating voltage source, called primary. The load (consumer) is connected to the secondary winding. The effect of the transformer is based on the EMP phenomenon. When current passes through the primary winding, a changing magnetic flux appears in the core. This flow passes through the magnetic circuit of the transformer and. penetrating the turns of the primary and secondary windings, induces variable EMF in them. If a receiver is connected to the secondary winding, then under the action of the EMF, current i passes through its circuit.