List of top Physics Questions on Stress and strain asked in CUET (PG)

The expression for hoop stress/circumferential stress (F1) generated in the material of thin cylinder due to internal pressure of fluid (P) is given by:
Where t = thickness of the wall of cylinder
d = internal diameter of cylinder
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The gradient of velocity at right angles to the flow is called the shear rate.
Reason R: Shear rate is also known as velocity gradient or strain raste.
In the light of the above statements, choose the correct answer from the options given below :
The radius of Mohr's circle of stress of a stressed element is 30 N/mm2 and minor principal tensile stress is 15 N/mm2. The major principal stress is: