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In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slip
- a)the torque for the former is zero and has a non-zero negative value for the later.
- b)the torque has non-zero positve value on both of the characteristics.
- c)the torque is zero on both of the characteristics,
- d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.
Correct answer is option 'A'. Can you explain this answer?
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Torque-slip Characteristic of a Balanced Poly-phase Induction Motor and a Single Phase Induction Motor
The torque-slip characteristic of an induction motor represents the relationship between the torque produced by the motor and the slip, which is the difference between the synchronous speed and the actual speed of the rotor. In this comparative study, we are comparing the torque-slip characteristics of a balanced poly-phase induction motor and a single-phase induction motor.
Understanding the Torque-Slip Characteristic
Before discussing the answer options, let's briefly understand the torque-slip characteristic. The torque-slip characteristic curve of an induction motor consists of two regions: the starting region and the running region. In the starting region, the slip is high, and the torque is low. As the slip decreases, the torque increases until it reaches the maximum value known as the breakdown torque. Further reduction in slip results in a decrease in torque.
Answer Explanation
Now, let's analyze the given answer options and understand why option 'A' is correct:
a) The torque for the former is zero and has a non-zero negative value for the latter.
- This answer option is correct because a balanced poly-phase induction motor does not produce any torque at zero slip. In contrast, a single-phase induction motor has a non-zero negative value for torque at zero slip. This is due to the inherent nature of the single-phase induction motor, which requires an additional starting mechanism (such as a capacitor) to generate a rotating magnetic field and produce torque.
b) The torque has a non-zero positive value on both of the characteristics.
- This answer option is incorrect because the torque for a balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
c) The torque is zero on both of the characteristics.
- This answer option is incorrect because the torque for a single-phase induction motor is non-zero and negative at zero slip.
d) The torque has a non-zero positive value on the former and has a non-zero negative value on the latter.
- This answer option is incorrect because the torque for a balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
Therefore, the correct answer is option 'A': the torque for the balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
The torque-slip characteristic of an induction motor represents the relationship between the torque produced by the motor and the slip, which is the difference between the synchronous speed and the actual speed of the rotor. In this comparative study, we are comparing the torque-slip characteristics of a balanced poly-phase induction motor and a single-phase induction motor.
Understanding the Torque-Slip Characteristic
Before discussing the answer options, let's briefly understand the torque-slip characteristic. The torque-slip characteristic curve of an induction motor consists of two regions: the starting region and the running region. In the starting region, the slip is high, and the torque is low. As the slip decreases, the torque increases until it reaches the maximum value known as the breakdown torque. Further reduction in slip results in a decrease in torque.
Answer Explanation
Now, let's analyze the given answer options and understand why option 'A' is correct:
a) The torque for the former is zero and has a non-zero negative value for the latter.
- This answer option is correct because a balanced poly-phase induction motor does not produce any torque at zero slip. In contrast, a single-phase induction motor has a non-zero negative value for torque at zero slip. This is due to the inherent nature of the single-phase induction motor, which requires an additional starting mechanism (such as a capacitor) to generate a rotating magnetic field and produce torque.
b) The torque has a non-zero positive value on both of the characteristics.
- This answer option is incorrect because the torque for a balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
c) The torque is zero on both of the characteristics.
- This answer option is incorrect because the torque for a single-phase induction motor is non-zero and negative at zero slip.
d) The torque has a non-zero positive value on the former and has a non-zero negative value on the latter.
- This answer option is incorrect because the torque for a balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
Therefore, the correct answer is option 'A': the torque for the balanced poly-phase induction motor is zero at zero slip, and the single-phase induction motor has a non-zero negative value for torque at zero slip.
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In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer?
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In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer?.
In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for In a comparative study of the torque-slip characteristic of a balanced poly-phase induction motor and that of a single phase induction motor, it is found that for zero slipa)the torque for the former is zero and has a non-zero negative value for the later.b)the torque has non-zero positve value on both of the characteristics.c)the torque is zero on both of the characteristics,d)the torque has a non-zero positive value on the former and has a non-zero negative value on the later.Correct answer is option 'A'. Can you explain this answer?.
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