A wire of length 1   m and radius 2   mm is vertically clamped. The lower end is twisted through…

A wire of length 1 m and radius 2 mm is vertically clamped. The lower end is twisted through an angle of 45°. The angle of shear is _____
  1. 0.09°
  2. 0.9°
  3. 9°
  4. 90°

Solution

from figure 

tanϕ=rsinθl

here θ and ϕ are small

⇒ϕ=rθl =2×10-3×451=.09°

Asked in: AP EAMCET 2020 (23 Sep Shift 1)

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