The shear stress in a circular shaft under torsion is given by:

A τ = F/A

B τ = Tr/J (where T = torque, r = radius, J = polar moment)

C τ = Mc/I

D τ = P/A

✓ Correct Answer: Option B

Torsion formula: τ = Tr/J. Maximum shear stress occurs at the outer surface (r = c).

💡 Why is B) the correct answer?

The correct answer to the question "The shear stress in a circular shaft under torsion is given by:" is Option B: τ = Tr/J (where T = torque, r = radius, J = polar moment).

The other options — A) τ = F/A, C) τ = Mc/I, D) τ = P/A — are incorrect for this FE Exam Prep question. As explained above: Torsion formula: τ = Tr/J. Maximum shear stress occurs at the outer surface (r = c).

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Engineering Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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The shear stress in a circular shaft under torsion is given by:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

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