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Question

Assertion (A): The failure surface of a mild steel torsion specimen subject to a torque about its axis is along a surface perpendicular to its axis.
Reason (R): Mild steel is relatively weaker in shear than in tension and the plane of maximum shear is perpendicular to its axis.

A
both A and R are true and R is the correct explanation of A
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B
both A and R true but R is not a correct explanation of A
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C
A is true but R is false
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D
A is false but R is true.
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Solution

The correct option is A both A and R are true and R is the correct explanation of A
Both A and R are true and R is the correct explanation of A

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