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The twisting couple per unit twist of a cylinder depends on

Question and options

The twisting couple per unit twist of a cylinder depends on
  1. Young’s modulus
  2. Bulk modulus
  3. Modulus of rigidity
  4. Poisson’s ratio

Answer and explanation

Correct answer: C - Modulus of rigidity
Couple per unit twist of a cylinder C=πηr42lC = \frac{\pi \eta r^4}{2l}, which depends on the modulus of rigidity η\eta.

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