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According to Mohr's circle, the shear stress is maximum when:

According to Mohr's circle, the shear stress is maximum when: Correct Answer θ = 45° 

Explanation:

The plane on which normal stress attains its maximum and minimum values are called principal planes. The shear stress on the principal plane is zero.

The planes of maximum and minimum normal stresses are at an angle of 90° to each other.

Planes of maximum stress occur at 45° to the principal planes.

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