This document discusses transformers, which allow for adjusting voltage levels by exploiting electromagnetic induction. Transformers work by inducing an electric current in one coil (the secondary winding) through a changing magnetic field created in another coil (the primary winding). The ratio of winds between the primary and secondary determines whether a transformer steps up or steps down voltage. Transformers are crucial for power transmission as they enable increasing voltage for transport over long distances to reduce losses, before lowering it for end use. Their applications include electricity distribution, electronics, and regulating voltage.

1. Transformer
BY-ROSHAN PATEL
REGD NO-220301120061

2. Contents
 Need of transformer
 Introduction
 Principle
 Basis of winding
 Application of Transformers

3. Need of transformer
 To transform the available voltage to required voltage .
 n most cases, appliances are manufactured to work under some specific
voltages. Transformers are used to adjust the voltages to a proper level.
 transformers are the basic components for the transmission of the
electricity.
 By increasing the voltages the loss of the electricity in the transmission
purpose is minimized.

4. Introduction
 Transformer is a device allows you to increase or decrease the voltage and
intensity of an electric current (alternating), but keeping the power
constant.
 It transfer electrical energy from one part of the electrical or electronic
circuit to other part of circuit without changing the frequency.

5. Principle (Electromagnetic Mutual
Induction)
 It works on the Michal Faradays law of Electromagnetic Mutual Induction
 When the current is provided to the Primary Winding it behaves as
electromagnet due to this the EMF is induced in the Secondary winding as
it comes in the area having magnetic field lines due to primary Winding.

6. Basis of windings
 Step up Transformer: The no of windings on Primary side is less than the
no. of windings on the secondary side.(Np>Ns)
 Step down Trarnsformer: The no. of winding on Primary side are more
than the no. of windings on the secondary side. (Np<Ns)
 Isolation Transformer: The no. of winding on Primary side are equal to
the no. of windings on the secondary side. (Np = Ns)

7. Application
 Transmitting electrical energy over long distances through wires.
 Transformers with several secondary's are used in television and radio
receivers where several different voltages are required.
 Used as voltage regulator

8. Thankyou