Answer :
Final answer:
Increasing the speed of rotation in an AC generator leads to an increase in both frequency and output voltage. The frequency rises because it is directly proportional to the speed of rotation. Therefore, the correct answer is option A.
Explanation:
Effect of Increasing Speed of Rotation in an AC Generator
In an AC generator, the frequency and output voltage are influenced by the speed at which the coils rotate. If the speed of rotation of the coils increases, both the frequency and the output voltage of the generator will also increase.
The frequency of the generated AC voltage is directly proportional to the speed of rotation of the coils. This means that as the rotational speed increases, the number of cycles produced per second (frequency) also increases. Additionally, a higher speed typically results in a greater output voltage, due to the increased electromagnetic induction occurring in the generator.
Hence, the correct answer to the question is A. Frequency increases and output voltage increases.
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