Correct option is A
The core of a transformer is laminated to reduce energy losses due to eddy currents. Eddy currents are loops of electric current induced within the conductor by a changing magnetic field. These currents produce heat, leading to energy loss. By laminating the core, the area available for eddy currents to flow is reduced, thus minimizing these losses and improving efficiency.
Laminating the core does not affect the secondary voltage but ensures that the transformer operates more efficiently by reducing unwanted heating.
