Explain the mechanism by which AC (alternating current) through the primary circuit of a transformer produces an alternating voltage and current in the secondary coil. Then explain why this would or would not work with DC (nonalternating current) in the primary coil.

The right answer for the question that is being asked and shown above is that: "It takes a changing magnetic field to create an electric field. So if it was DC the magnetic field from the primary would be unchanging, and no voltage would be induced."

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Vespertilio Vespertilio · Answer 2 · 2019-05-24T10:21:45+02:00

Answer:

It is based on the principle of electromagnetic induction.

Explanation:

When a magnetic flux linked with a coil changes, an induced emf and induced current is developed in the coil. This phenomenon is called electromagnetic induction.

AC current is time varying sinusoidal current, but DC current is steady current.

When an AC current pass through the primary coil of transformer, the magnetic flux linked with the coil changes. This magnetic flux is linked with the secondary coil which is placed near to the primary coil. As the flux changes in the secondary coil, the induced voltage and current is produced in the secondary coil of transformer.

In case of DC current, there is no changing flux because DC current is steady current, so DC current would not work in case of transformer.