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 $2 q$ .

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 $45 °$

- 1
  
  $1$ and $2$ are correct
- 2
  
  $2$ and $4$ are correct
- 3
  
  $3$ and $4$ are correct
- 4
  
  $1, 2$ , $3$ and $4$ are correct

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