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Strength of Materials
Bending of Beams
GATE 2017
Easy

Consider a beam with circular cross-section of diameter d. The ratio of the second moment of area about the neutral axis to the section modulus of the area is

  • d/2
  • Bπd/2
  • Cd
  • Dπd

Explanation

Section modulus Z = I/c, where c is the distance from the neutral axis to the extreme fiber (c=d/2 for a circular section). So I/Z = c = d/2.

Source: GATE ME 2017 Session 1 (ME-1) (2017)

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