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 [ σt/et or σc/ec]
S.No.
|
Material
|
Young's Modulus(E)
|
1
|
Mild steel
|
2.1 × 105 N/mm2
|
2
|
Cast Iron
|
1.3 × 105 N/mm2
|
3
|
Aluminium
|
0.7 × 105 N/mm2
|
4
|
Copper
|
1.0 × 105 N/mm2
|
5
|
Timber
|
0.1 × 105 N/mm2
|
The percent error in calculation of Young's modulus is: [(E1 - E2)/E1] × 100