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If ϕm is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given by
- a)2 ϕm and 1.5 ϕm; both rotating
- b)1.5 ϕm, rotating and ϕm, standstill
- c)1.5 ϕm, and ϕm; both standstill
- d)1.5 ϕm, and ϕm; both rotating
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
If m is the maximum value of flux due to any one phase, the resultant ...
If n be the number of phases then,
magnitude of resultant flux = n/2 ϕm
(n = 3 for 3-phase and n = 2 for 2-phase)
∴ For 3 phase,
and for 2 phase,
Both the resultant flux will be rotating.
magnitude of resultant flux = n/2 ϕm
(n = 3 for 3-phase and n = 2 for 2-phase)
∴ For 3 phase,
and for 2 phase,
Both the resultant flux will be rotating.
Most Upvoted Answer
If m is the maximum value of flux due to any one phase, the resultant ...
The correct answer is option 'D': 1.5 m and m; both rotating.
Explanation:
In 3-phase and 2-phase ac machines, the resultant flux is determined by the sum of the individual fluxes produced by each phase. Let's analyze the given options to understand which one is correct.
a) 2 m and 1.5 m; both rotating
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a 2-phase machine, there are only two phases. So, the total resultant flux would be 2m. Hence, this option is incorrect.
b) 1.5 m, rotating and m, standstill
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a 2-phase machine, there are only two phases. So, the total resultant flux would be 2m. Hence, this option is incorrect.
c) 1.5 m and m; both standstill
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a standstill machine, there is no rotation, and the flux remains constant. Hence, this option is incorrect.
d) 1.5 m and m; both rotating
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. Similarly, for a 2-phase machine, there are only two phases, and the total resultant flux would be 2m. Since both machines are rotating, this option is correct.
In summary, the resultant flux in 3-phase and 2-phase ac machines is given by 1.5 m and m, respectively, when both are rotating.
Explanation:
In 3-phase and 2-phase ac machines, the resultant flux is determined by the sum of the individual fluxes produced by each phase. Let's analyze the given options to understand which one is correct.
a) 2 m and 1.5 m; both rotating
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a 2-phase machine, there are only two phases. So, the total resultant flux would be 2m. Hence, this option is incorrect.
b) 1.5 m, rotating and m, standstill
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a 2-phase machine, there are only two phases. So, the total resultant flux would be 2m. Hence, this option is incorrect.
c) 1.5 m and m; both standstill
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. However, for a standstill machine, there is no rotation, and the flux remains constant. Hence, this option is incorrect.
d) 1.5 m and m; both rotating
This option suggests that the maximum value of flux due to any one phase is m. In a 3-phase system, the maximum value of flux due to any one phase is m. Therefore, the total resultant flux would be 3m for a rotating 3-phase machine. Similarly, for a 2-phase machine, there are only two phases, and the total resultant flux would be 2m. Since both machines are rotating, this option is correct.
In summary, the resultant flux in 3-phase and 2-phase ac machines is given by 1.5 m and m, respectively, when both are rotating.
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Question Description
If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer?.
If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer? for Electrical Engineering (EE) 2026 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2026 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If m is the maximum value of flux due to any one phase, the resultant flux in 3-phase and 2-phase ac machines would be given bya)2 m and 1.5 m; both rotatingb)1.5 m, rotating and m, standstillc)1.5 m, and m; both standstilld)1.5 m, and m; both rotatingCorrect answer is option 'D'. Can you explain this answer?.
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