Question

What is the purpose of a transformer ? explain its construction , types and working . ​

Answer 1

Explanation:

Basically a transformer consists of two inductive coils; primary winding and secondary winding. The coils are electrically separated but magnetically linked to each other. When, primary winding is connected to a source of alternating voltage, alternating magnetic flux is produced around the winding.

Answer 2

Explanation:

Transformer is broadly usee electrical device and it is used for many purposes . it is necessary to change an alternating voltage from one to another of greater or smaller value m it is based on principal of mutual induction.

Construction :- It consist of two coil wounded on soft iron core . which is made up by thick sheet of a material having very small loss of energy .

The coil in which supply an electrical emf is called primary coil (P) and the cooul by which obtained emf is called secondary coil (S) these ,two coils & core is made insulated from each other .

• Figure is attached of transformer.

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Types of transformer :- Transformer are following two types

(a) step - up :- If no. of turns in secondary coil is more than that of primary is called set up.

(b) If no turns in secondary coil is less then than that of primary coil is step - down .

Working :-

When the primary coil of transfer is connected to an emf . then there is an induced emf in that of coil due to this magnetic flux through the core passed by secondary coil since direction of alternating emf changes continuously . Hence , there will be change in flux through the secondary coil hence an induced emf produced in secondary coil .

Vs/Vp = Ns/Np = r

where => Vs = EMF in secondary coil

Vp = end in primary coil .

Ns = no. of terms in secondary coil .

Np = no. of terms in primary coil.

•°• r = transformer ratio.

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Hope it's helpful .

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