Question

Transformer core is laminated because:

• A. To reduce eddy current loss
• B. To reduce hysteresis loss
• C. To reduce copper loss
• D. To reduce core loss

Hint:

To reduce eddy current loss in transformers, the core is laminated to limit the circulation of these currents and increase efficiency.

Answer 1

The Correct Option is A

The transformer core is laminated to reduce eddy current loss. Eddy currents are circulating currents induced in the core material due to the alternating magnetic flux. These currents cause energy loss in the form of heat. Laminating the core effectively reduces the area through which these eddy currents can circulate, thus minimizing the loss. Step 1: Understand eddy currents.
Eddy currents are unwanted loops of current induced in the core of the transformer due to alternating magnetic fields. The power lost in these currents results in heat generation, which decreases the efficiency of the transformer.
Step 2: Lamination and its effect.
By laminating the transformer core (i.e., using thin sheets of the core material and insulating them from each other), the path for the eddy currents is broken, thereby reducing the eddy current loss.
Step 3: Conclusion.
Therefore, the main reason for laminating the transformer core is to reduce eddy current loss.
Final Answer: (A) To reduce eddy current loss