During the analysis of bars of composite sections as shown in the given figure. The modular ratio is defined as ________.
1
Young modulus of Bar 1 / Young modulus of Bar 2
2
Shear modulus of Bar 2 / Shear modulus of Bar 1
3
Shear modulus of Bar 1 / Shear modulus of Bar 2
4
Young modulus of Bar 2 / Shear modulus of Bar 1