The phase difference between each pair of coils of a three phase alternating current generatoris
Correct answer: C. 120°
- A. 0°
- B. 60°
- C. 120°
- D. 180°
Explanation
A three-phase alternating current generator produces three waveforms that are 120° out of phase with each other. This phase difference is critical for creating a balanced system where power is continuously supplied. This 120° separation allows for efficient transmission and distribution of electricity. The other options represent phase differences that do not describe a balanced three-phase system. A 0° phase difference would mean all phases are in sync, which isn't the case here. A 60° phase difference doesn't provide the necessary separation for three phases, and a 180° phase difference would imply two phases, leading to an incorrect configuration for a three-phase system.
Last updated
About Phase of Alternating Current
Phase describes the position of an alternating voltage or current within its cycle and the phase difference between two sinusoidal quantities. The topic covers in phase signals, phase angle and lead or lag in resistive, inductive and capacitive circuits, rather than the amplitude or frequency of the supply.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A phase difference of 90 degrees is equal to:
Alternating current cannot be measured with a moving coil galvanometer directly because
An alternating current is represented by the equation I = I∫sinπt which of the following equation represents an alternating current of frequency and amplitude twice that of the above current ?
An alternating current of the r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing a 10Ω resistor. The peak current is then ?
An alternating voltage is given by 30sin157 the frequency of alternating voltage is: