There are two rods, one of aluminium and the other of copper. The cross-sectional area and the length of both the rods are same. If both the rods are stretched with the same magnitude of force, then:
1
Stress is same but strain is different in both the rods
2
Stress is different but strain is same in both the rods
3
Stress and strain is same in both the rods
4
Stress and strain is different in both the rods