Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > Assertion (A): An a.c. servomotor used in con... Start Learning for Free
Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.
Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.
Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.
- a)Both A and R are true and R is a correct explanation of A.
- b)Both A and R are true but R is not a correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
Assertion (A): An a.c. servomotor used in control system applications ...
Reason is a false statement because small diameter and large axial length will give a lower value of inertia of motor.
Most Upvoted Answer
Assertion (A): An a.c. servomotor used in control system applications ...
Understanding the Assertion and Reason
The assertion (A) states that an a.c. servomotor used in control system applications must have high starting torque and low inertia. This is indeed true for servomotors as they are required to respond quickly to changes in control signals, which necessitates both high starting torque and low inertia.
High Starting Torque
- Servomotors need to start quickly and efficiently to follow control commands.
- High starting torque enables the motor to overcome static friction and inertia of the load, ensuring a prompt response.
Low Inertia
- Low inertia is essential for rapid acceleration and deceleration.
- It allows the motor to change speeds quickly, which is vital in control systems where precision is critical.
Evaluating the Reason
The reason (R) claims that a large rotor diameter and small axial length contribute to higher starting torque and lower inertia. However, this statement is misleading.
Rotor Characteristics
- While a larger rotor diameter can increase torque, it may not always correlate with low inertia.
- Inertia is influenced by both the mass of the rotor and its distribution. A larger rotor may indeed have higher torque but can also have increased inertia if not designed appropriately.
Conclusion
- Since assertion (A) is true, but reason (R) does not correctly explain it, the correct answer is option 'C': A is true but R is false. The relationship between rotor dimensions and performance characteristics isn’t as straightforward as R suggests.
The assertion (A) states that an a.c. servomotor used in control system applications must have high starting torque and low inertia. This is indeed true for servomotors as they are required to respond quickly to changes in control signals, which necessitates both high starting torque and low inertia.
High Starting Torque
- Servomotors need to start quickly and efficiently to follow control commands.
- High starting torque enables the motor to overcome static friction and inertia of the load, ensuring a prompt response.
Low Inertia
- Low inertia is essential for rapid acceleration and deceleration.
- It allows the motor to change speeds quickly, which is vital in control systems where precision is critical.
Evaluating the Reason
The reason (R) claims that a large rotor diameter and small axial length contribute to higher starting torque and lower inertia. However, this statement is misleading.
Rotor Characteristics
- While a larger rotor diameter can increase torque, it may not always correlate with low inertia.
- Inertia is influenced by both the mass of the rotor and its distribution. A larger rotor may indeed have higher torque but can also have increased inertia if not designed appropriately.
Conclusion
- Since assertion (A) is true, but reason (R) does not correctly explain it, the correct answer is option 'C': A is true but R is false. The relationship between rotor dimensions and performance characteristics isn’t as straightforward as R suggests.
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Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. 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 Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. 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 Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?.
Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. 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 Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. 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 Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?, a detailed solution for Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? has been provided alongside types of Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Assertion (A): An a.c. servomotor used in control system applications must have high starting torque and low inertia.Reason (R): A large value of rotor diameter and small axial length gives a higher value of starting torque and a low value of inertia.a)Both A and R are true and R is a correct explanation of A.b)Both A and R are true but R is not a correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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