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If the induced emf in the stator of an 8 pole induction motor has a frequency of 50 Hz and that in the rotor is 1.5 Hz, at what speed is the motor running and what is the slip?
  • a)
    0.03
  • b)
    0.04
  • c)
    0.05
  • d)
    None of these
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
If the induced emf in the stator of an 8 pole induction motor has a f...
Slon: f = 50 Hz and fr = 1.5 Hz,
Ns = 120f/p = 120 x 50/8 = 750 rpm
We have fr = sf
Hence s= fr/f = 1.5/50 = 0.03
Hence, the correct option is (A)
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Most Upvoted Answer
If the induced emf in the stator of an 8 pole induction motor has a f...
Given Parameters:
Frequency of induced emf in stator (f) = 50 Hz
Frequency of induced emf in rotor (f') = 1.5 Hz
Number of poles (p) = 8

Formula used:
Synchronous speed (Ns) = (120 * f) / p
Actual speed (N) = (1 - s) * Ns
Slip (s) = (Ns - N) / Ns

Calculation:
Synchronous speed (Ns) = (120 * 50) / 8 = 750 rpm
Frequency of induced emf in rotor (f') = s * f
=> Slip (s) = f' / f = 1.5 / 50 = 0.03
Actual speed (N) = (1 - 0.03) * 750 = 727.5 rpm

Therefore, the motor is running at a speed of 727.5 rpm and the slip is 0.03. Hence, the correct answer is option A.
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Community Answer
If the induced emf in the stator of an 8 pole induction motor has a f...
Stator loss is 300w
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If the induced emf in the stator of an 8 pole induction motor has a frequency of 50 Hz and that in the rotor is 1.5 Hz, at what speed is the motor running and what is the slip?a)0.03b)0.04c)0.05d)None of theseCorrect answer is option 'A'. Can you explain this answer?
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If the induced emf in the stator of an 8 pole induction motor has a frequency of 50 Hz and that in the rotor is 1.5 Hz, at what speed is the motor running and what is the slip?a)0.03b)0.04c)0.05d)None of theseCorrect answer is option 'A'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about If the induced emf in the stator of an 8 pole induction motor has a frequency of 50 Hz and that in the rotor is 1.5 Hz, at what speed is the motor running and what is the slip?a)0.03b)0.04c)0.05d)None of theseCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the induced emf in the stator of an 8 pole induction motor has a frequency of 50 Hz and that in the rotor is 1.5 Hz, at what speed is the motor running and what is the slip?a)0.03b)0.04c)0.05d)None of theseCorrect answer is option 'A'. Can you explain this answer?.
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