We did not talk about transformers in class, but I showed you one: Two coils con

Question

We did not talk about transformers in class, but I showed you one: Two coils connected by an iron core. Alternating voltage sent to the primary coil induces a change in the magnetic field through the two coils and the variable flux induces a potential difference at the secondary coil. The incoming voltage may be reduced or increased by simply varying the ratio of the numbers of turns between the two coils. The magnetic flux and the electric power are constant for an ideal transformer. Transformers work with AC and deliver AC with only a different voltage, (and current) The voltage at the secondary may be found from the following equation: Vs/Vp = Ns/Np. And now, the question: A transformer has an output coil with 6 times as many turns as the input coil. If the input frequency is f then the output frequency will be 9f 6f 1/6f f

Explanation / Answer

Any transformer can never change the frequency, so the output frequency will also be f.

An AC is produced by an AC generator and its frequency is decided at the time of its production only. It depends on how fast the armeture coil is rotating between the two magnets. It can not be changed later on.

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