A bar of brass is enclosed in a steel tube and are rigidly fastened at both the ends. If the coefficient of thermal expansion of brass is more than that of the steel, when the temperature rises, the nature of stresses developed are-
1
tensile in steel and compressive in brass bar
2
compressive in steel and tensile in brass bars
3
tensile in both steel and brass bars
4
compressive in both steel and brass bars