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UPSC Civil Service Exam Questions - Engineering

Q1:

A bar of circular cross-section of diameter D is subjected to a torque T at B as shown in the figure given. What is the angle of twist at A?

A Same as that at B

B Zero

C Twice as that at B

D Half as that at B

ANS:A - Same as that at B

The angle at any point is independent of Length from the fixed end so whatever the angle is at B same will be at the end of the bar.