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In comparison to a resistance start motor, the capacitor start motor has
1. high starting torque
2. high running torque
3. larger phase difference between two winding currents
4. low starting current
Out of these, the correct answer is
1. high starting torque
2. high running torque
3. larger phase difference between two winding currents
4. low starting current
Out of these, the correct answer is
- a)1, 2, 3 and 4
- b)3 and 4
- c)1, 3 and 4
- d)1 and 4
Correct answer is option 'C'. Can you explain this answer?
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In comparison to a resistance start motor, the capacitor start motor h...
Introduction:
The given question is related to the comparison between a resistance start motor and a capacitor start motor. We need to identify the characteristics of a capacitor start motor in comparison to a resistance start motor.
Comparison:
Let's analyze each statement given in the question and determine whether it applies to a capacitor start motor.
1. High starting torque:
A capacitor start motor has higher starting torque as compared to a resistance start motor. The presence of a capacitor in the motor circuit increases the overall torque during the starting phase. This is because the capacitor helps create a phase difference between the starting winding and the running winding, resulting in a higher starting torque.
2. High running torque:
The running torque of a motor is the torque produced by the motor during its normal operation. This torque is mainly determined by the design and construction of the motor. The presence of a capacitor in a capacitor start motor does not significantly affect the running torque. Therefore, this statement is not applicable to a capacitor start motor.
3. Larger phase difference between two winding currents:
A capacitor start motor has a larger phase difference between the currents flowing through its starting winding and running winding. This phase difference is created by the presence of a capacitor in the starting winding circuit. The larger phase difference helps in generating a higher starting torque, as mentioned earlier.
4. Low starting current:
One of the advantages of a capacitor start motor is its relatively low starting current. The presence of a capacitor in the starting winding circuit helps in reducing the starting current. This is beneficial for the motor as it reduces stress on the electrical system and prevents excessive heating of the motor during the starting phase.
Conclusion:
Based on the analysis of the statements, it can be concluded that a capacitor start motor possesses the following characteristics in comparison to a resistance start motor:
- High starting torque
- Larger phase difference between two winding currents
- Low starting current
Therefore, the correct answer is option 'C': 1, 3, and 4.
The given question is related to the comparison between a resistance start motor and a capacitor start motor. We need to identify the characteristics of a capacitor start motor in comparison to a resistance start motor.
Comparison:
Let's analyze each statement given in the question and determine whether it applies to a capacitor start motor.
1. High starting torque:
A capacitor start motor has higher starting torque as compared to a resistance start motor. The presence of a capacitor in the motor circuit increases the overall torque during the starting phase. This is because the capacitor helps create a phase difference between the starting winding and the running winding, resulting in a higher starting torque.
2. High running torque:
The running torque of a motor is the torque produced by the motor during its normal operation. This torque is mainly determined by the design and construction of the motor. The presence of a capacitor in a capacitor start motor does not significantly affect the running torque. Therefore, this statement is not applicable to a capacitor start motor.
3. Larger phase difference between two winding currents:
A capacitor start motor has a larger phase difference between the currents flowing through its starting winding and running winding. This phase difference is created by the presence of a capacitor in the starting winding circuit. The larger phase difference helps in generating a higher starting torque, as mentioned earlier.
4. Low starting current:
One of the advantages of a capacitor start motor is its relatively low starting current. The presence of a capacitor in the starting winding circuit helps in reducing the starting current. This is beneficial for the motor as it reduces stress on the electrical system and prevents excessive heating of the motor during the starting phase.
Conclusion:
Based on the analysis of the statements, it can be concluded that a capacitor start motor possesses the following characteristics in comparison to a resistance start motor:
- High starting torque
- Larger phase difference between two winding currents
- Low starting current
Therefore, the correct answer is option 'C': 1, 3, and 4.
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