Consider a stepped shaft subjected to a twisting moment

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Consider a stepped shaft subjected to a twisting moment applied at B as shown in the figure. Assume shear modulus, G = 77 GPa. The angle of twist at C (in degree) is _______.

1. 1
2. 0.236050
3. 2.236356
4. 1.936050

Correct Option: A

Angle of twist at (C) = Angle of twist at (B)

⇒ θ =	TL
	GJ

⇒	10 × 0.5 × 32
	77 × 10⁹ × π × .024

⇒ 0.236050