Question

Mohr’s circle is a graphical method to find

• A. Bending stresses
• B. Principal stresses
• C. Torsional shear stresses
• D. None

Hint:

Mohr’s circle is especially useful when stresses act simultaneously in two perpendicular directions.

Answer 1

The Correct Option is B

Step 1: Understand Mohr’s circle.
Mohr’s circle is a graphical representation of the state of stress at a point. It helps visualize normal and shear stresses acting on different planes.
Step 2: Identify what Mohr’s circle provides.
Using Mohr’s circle, we can determine:
- Principal stresses
- Maximum shear stress
- Orientation of principal planes
Step 3: Evaluate the options.
(A) Bending stresses: These are obtained using bending theory, not Mohr’s circle.
(B) Principal stresses: Correct, Mohr’s circle is primarily used to determine principal stresses graphically.
(C) Torsional shear stresses: These are calculated using torsion theory, not Mohr’s circle directly.
(D) None: Incorrect, since Mohr’s circle has clear applications.
Step 4: Conclusion.
Therefore, Mohr’s circle is a graphical method to find principal stresses.