Question

The core of a transformer is laminated so that...... (a) Ratio of I/ \(p\) \& O/p voltage increases (b) Rusting of core may be stopped (c) Energy loss due to eddy current may be reduced (d) Change in flux is increased

Short answer

The core of a transformer is laminated to minimize eddy currents and reduce energy loss. By breaking the core into thin, insulated layers, it restricts the flow of eddy currents, significantly reducing energy loss due to heating. The correct reason for having a laminated core is: (c) Energy loss due to eddy current may be reduced.

Step-by-step solution

Understanding transformers

A transformer is an electrical device used to transfer electrical energy between two or more circuits through electromagnetic induction. It consists of coils called primary and secondary windings, wound around a core, which is usually made of iron.

Exploring the core's role in transformers

The core of a transformer acts as a path for magnetic flux. By forming a closed loop, it directs the magnetic flux created by the primary winding to the secondary winding, allowing energy to be transferred between the two coils.

Discussing eddy currents and energy loss

Eddy currents are generated in the transformer core due to the changing magnetic field. These currents flow inside the core material, producing heat and leading to energy loss. An ideal core should have minimum energy loss to ensure maximum efficiency of the transformer.

Examining the reason for a laminated core

The core of a transformer is laminated to minimize eddy currents and the resulting energy loss. By breaking the core into thin, insulated layers, it restricts the flow of eddy currents, significantly reducing energy loss due to heating.

Identifying the correct reason from the options

Based on the explanation given in the previous steps, it is clear that the purpose of laminating the core of a transformer is to reduce energy loss due to eddy currents. Therefore, the correct option is: (c) Energy loss due to eddy current may be reduced