Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
A. 2
B. 4
C. 8
D. 16
Answer: Option D
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I think it should be ie. Angle of twist is proportional to 1/J or d⁴ as J=π/32d⁴ (Is my understanding wrong anyone know means help frnds)
angle of twist (θ) is proportional to 1/J or 1/d4