A steel rod of dimesions 4 xx 4 cm^(2)is tightly fixed between two supports and is not allowed to expand. It is heated through 2^(@) C. Thermal stress developed is .... 10^(6) N//m^(2)

A steel rod of dimesions 4 xx 4 cm^(2)is tightly fixed between two sup

1.	A steel rod of dimesions 4 xx 4 cm^(2)is tightly fixed between two supports and is not allowed to expand. It is heated through 2^(@) C. Thermal stress developed is .... 10^(6) N//m^(2)
Answer» 7.2 2.7 3.6 0.72 Answer :A