1. Consider the following statements :
If two planes at right angles carry only shear stress of magnitude 'q', then the
1. diameter of Mohr's circle would equal 2q
2. centre of the Mohr's circle would lie at the origin
3. principal stresses are unlike and have magnitude 'q'
4. angle between the principal plane and the plane of maximum shear would be equal to 45° Of these statements :