In a uni-dimensional stress system, the principal plane is defined as one on which the:
1. Shear stress is zero
2. Normal stress is zero
3. Shear stress is maximum
4. Normal stress is maximum
Of these statements:
1
1 and 2 are correct
2
2 and 3 are correct
3
1 and 4 are correct
4
3 and 4 are correct