Question

In transformer the loss of energy due to eddy currents can be reduced by :

• A. Taking thick wire of copper
• B. Taking thin wire of copper
• C. Laminating the core
• D. Taking the core of soft iron

Answer 1

The correct option is C Laminating the core

Answer is C.

Eddy current losses due to joule heating in the core that are proportional to the square of the transformer's applied voltage.
Eddy current losses can be reduced by making the core of a stack of plates electrically insulated from each other, rather than a solid block; all transformers operating at low frequencies use laminated or similar cores.