What is active gyroscopic couple - Theory of Machines - 2

Q.  Which of the following statements is/are false for active gyroscopic couple?
- Published on 06 Aug 15

a. Reactive gyroscopic couple and active gyroscopic couple are opposite in direction
b. In right hand rule, curled fingers denote direction of precession
c. In active gyroscopic couple spin vector and precession vector are parallel to each other
d. All the statements are false

ANSWER: In active gyroscopic couple spin vector and precession vector are parallel to each other

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