Why is the iron core of a transformer laminated?

Question

G1 Physics · Accepted Answer

Step 1: Changing core flux also induces circulating currents inside a solid conducting core. Step 2: Those eddy currents dissipate energy as I²R heat, reducing transformer efficiency. Step 3: Laminating and insulating thin iron sheets breaks the current paths and reduces eddy-current losses. Answer B. Final answer: (B) To minimise energy loss due to eddy currents.