Discussion
Assertion (A): A synchronous motor cannot start with its field excited.
Reason (R): The torque on a stationary rotor field reverses every half cycle.
Select the correct option.
Answer: C
A revolving stator field sweeping past a stationary rotor field gives an alternating torque whose average over a revolution is nothing. The reason is exactly why the field has to wait until the rotor is nearly up to speed.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development