CUET · PHYSICS · PYQ PAPER 2023

The frequencies of a.c. generator depends on :

A amplitude of a.c.
B size of the coil
C speed of the rotation of the coil
D wavelength of a.c.

Verified Solution

Answer & Solution

Correct Answer

(C) speed of the rotation of the coil

Step-by-step Solution

Detailed explanation

The frequency of an AC generator is directly proportional to the angular speed ( \(\omega\) ) at which the coil rotates within the magnetic field. Faster rotation produces more cycles of alternating current per second, increasing the frequency ( \(f=\frac{\omega}{2 \pi}\) ). C)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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