MHT CET 2024 Physics question

The core used in transformer and other electromagnetic devices is laminated to

(A)increase the magnetic field
(B)increase the level of magnetic saturation of the core
(C)reduce the residual magnetism in the core
(D)reduce eddy currentCorrect

Answer: (D)

Solution

A changing magnetic flux induces circulating currents (eddy currents) in the iron core, which produce heating and waste energy. Laminating the core, i.e. building it from thin sheets insulated from each other, breaks the large conducting paths, increases the resistance to

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Question ID VK-092594