Concept:Laminating the soft iron core reduces the energy lost inside the core due to induced circulating currents.
Explanation:In a transformer, the alternating magnetic flux produced in the iron core induces small circulating currents inside the core itself.
These induced currents are called eddy currents.
Eddy currents flow in closed loops inside the solid iron core and produce unwanted heat, causing energy loss.
To reduce this loss, the core is made of thin sheets of soft iron called laminations.
Each lamination is coated with a thin insulating layer, so the sheets are insulated from one another.
The insulating layers break the path of the eddy currents and increase the electrical resistance of the core.
With higher resistance, the magnitude of the eddy currents becomes smaller, and the heat energy loss is greatly reduced.
Answer:The correct option is A: reduce eddy current.