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A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, then
- a)f1 f2 > 50Hz and f1 > f2
- b)f1 < 50Hz and f2 > 50Hz
- c)f1 f2 < 50Hz and f1 > f2
- d)f1 > 50Hz and f2 < 50Hz
Correct answer is option 'C'. Can you explain this answer?
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We can use the formula for synchronous speed of an induction generator:
Ns = 120f/P
where Ns is the synchronous speed in RPM, f is the supply frequency in Hz, and P is the number of poles.
For a 4-pole generator, P=4, so Ns = 120f/4 = 30f.
When the generator is feeding power to a load at frequency f1, its synchronous speed is 1500 RPM, so:
Ns = 1500 RPM
30f1 = 1500 RPM
f1 = 50 Hz
When the load is partially removed and the frequency drops to f2, the synchronous speed remains the same at 1500 RPM, so:
Ns = 1500 RPM
30f2 = 1500 RPM
f2 = 50 Hz
Therefore, f1 = f2 = 50 Hz.
Ns = 120f/P
where Ns is the synchronous speed in RPM, f is the supply frequency in Hz, and P is the number of poles.
For a 4-pole generator, P=4, so Ns = 120f/4 = 30f.
When the generator is feeding power to a load at frequency f1, its synchronous speed is 1500 RPM, so:
Ns = 1500 RPM
30f1 = 1500 RPM
f1 = 50 Hz
When the load is partially removed and the frequency drops to f2, the synchronous speed remains the same at 1500 RPM, so:
Ns = 1500 RPM
30f2 = 1500 RPM
f2 = 50 Hz
Therefore, f1 = f2 = 50 Hz.
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A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer?
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A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer?.
A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A three-phase, 4pole, self excited induction generator is feeding power to a load at a frequency f1. If the load is partially removed, the frequency becomes f2. If the speed of the generator is maintained at 1500 rpm in both the cases, thena)f1 f2 > 50Hz and f1 > f2b)f1 < 50Hz and f2 > 50Hzc)f1 f2 < 50Hz and f1 > f2d)f1 > 50Hz and f2 < 50HzCorrect answer is option 'C'. Can you explain this answer?.
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