Explain Young's Modulus or Modulus of elasticity?
Sol. : It is ratio between tensile stress and tensile strain or compressive stress and compressive strain. It can be denoted by E. It is same as modulus of elasticity
E = σ/e [ σ_{t}/e_{t} or σ_{c}/e_{c}]
S.No.
Material
Young's Modulus(E)
1
Mild steel
2.1 × 10^{5} N/mm^{2}
2
Cast Iron
1.3 × 10^{5} N/mm^{2}
3
Aluminium
0.7 × 10^{5} N/mm^{2}
4
Copper
1.0 × 10^{5} N/mm^{2}
5
Timber
0.1 × 10^{5} N/mm^{2}
The percent error in calculation of Young's modulus is: [(E_{1} - E_{2})/E_{1}] × 100