Discussion
Assertion (A): Normal excitation of a synchronous motor rises with load.
Reason (R): The demagnetising armature reaction grows with the armature current.
Select the correct option.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. Normal excitation is the field current giving unity power factor, and as the load rises the armature current rises with it, so its demagnetising effect grows and more field current is needed to offset it. Normal excitation is therefore a curve rather than a single value.
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