Discussion
Consider the following pairs of property and description:
Rigidity in space - The axis stays fixed unless a torque acts
Precession - Response appears 90 degrees from the applied force
Precession rate - Torque divided by angular momentum
Rigidity - Increases as rotor speed falls
How many of the pairs given above are correctly matched?
Answer: B
Correct answer: Only three
The first three are right: rigidity in space is the axis holding its direction absent a torque, precession appears 90 degrees from the applied force, and the rate is torque divided by angular momentum.
The fourth reverses the dependence. Rigidity increases with rotor speed, since angular momentum rises with it and precession for a given torque falls. A slowing rotor is a less rigid one, which is exactly why a failing vacuum pump degrades an instrument progressively.
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