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  4. <B>Assertion: </B> A hollow shaft is found to be stronger than a solid shaft made of same material. <B>Reason: </B> The torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same size and material.

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Q. Assertion : A hollow shaft is found to be stronger than a solid shaft made of same material.
Reason : The torque required to produce a given twist in hollow cylinder is greater than that required to twist a solid cylinder of same size and material.

AIIMSAIIMS 2010Mechanical Properties of Solids

Solution:

Correct answer is (a) If both assertion and reason are true and reason is the correct explanation of assertion