The EMF induced in the secondary winding of a transformer depends on the .
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A.
magnetic flux linkage
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B.
armature reaction
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C.
power factor
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D.
load resistance
Correct Answer:
A. magnetic flux linkage
Explanation:
The induced EMF in a transformer's secondary winding is determined by the magnetic flux linkage. According to Faraday's Law of Electromagnetic Induction, the voltage generated in a coil is directly proportional to the rate at which the magnetic flux through that coil changes over time. While factors like load resistance, power factor, and armature reaction can influence a transformer's overall efficiency or operational performance, they do not dictate the fundamental generation of the electromotive force itself. Therefore, the interaction between the alternating magnetic field and the secondary turns, known as flux linkage, is the primary physical cause of the induced EMF.
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