If a steel wire is heated from 273 K to 473 K, and its elasticity modulus E= 2000 KN/m2. If the rod is free to expand, the thermal stress that develops in it is _______.
( α = 6× 10-6 K-1)
1
1200 N/m2
2
1600 N/m2
3
2400 N/m2
4
3600 N/m2
If a steel wire is heated from 273 K to 473 K, and its elasticity modulus E= 2000 KN/m2. If the rod is free to expand, the thermal stress that develops in it is _______.
( α = 6× 10-6 K-1)