Question 350Electricity & Electronics - QMED

The correct answer is C) increase to 61 Hz. The frequency of an AC generator is directly proportional to its rotational speed. When the generator speed is increased from 1800 RPM to 1830 RPM, the frequency will also increase proportionally. Since the initial frequency was 60 Hz at 1800 RPM, increasing the speed to 1830 RPM will result in a frequency increase to 61 Hz, as per the formula: Frequency (Hz) = (RPM x Number of Poles) / 60. The other options are incorrect because: A) decreasing to 59 Hz would not be correct, as the frequency should increase with the speed increase; B) remaining at 60 Hz would not be correct, as the frequency must change with the speed change; and D) increasing to 63 Hz would not be correct, as the frequency increase should be proportional to the speed increase.