MHT CET 2023 Physics question

The alternating e.m.f. included in the secondary coil of a transformer is mainly due to

(A)varying electric field
(B)varying magnetic fieldCorrect
(C)the iron core
(D)heat produced in the coil.

Answer: (B)

Solution

In a transformer, the alternating current in the primary produces an alternating (varying) magnetic flux in the iron core, which links the secondary coil. By Faraday's law, , a changing magnetic flux induces an emf in the secondary,

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Question ID VK-098293