Question

why there is no induced emf in primary coil of transformers?
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Answer 1

★᭄ꦿ᭄Answer★᭄ꦿ᭄

The fact that transformers are based on Faraday's law of induction makes it clear why we cannot use transformers to change DC voltages. If there is no change in primary voltage, there is no voltage induced in the secondary. One possibility is to connect DC to the primary coil through a switch.

Answer 2

Answer

EMF induced in primary is less by voltage drop of impedance on primary side of the windings — from applied primary voltage . Similarly, secondary terminal voltage is less by the drop across secondary equivalent impedance from induced voltage in it .:

Explanation: