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JEE PHYSICS MCQ: MECHANICAL PROPERTIES OF SOLIDS
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For most materials the Young’s modulus is n times the rigidity modulus, where is
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Correct option: B
3
Option B (3) is correct because Young's modulus is typically three times the rigidity modulus for most materials.
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Assertion: From the relation we can say that, if length of a wire is doubled, its Young's modulus of elasticity will also becomes two times.
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Reason: Modulus of elasticity is a material property. A wire can be broken by applying a load of 200 N. The force required to break another wire of the same length and same material, but double in diameter, is Assertion(A): If radius of cylindrical wire is doubled, then this wire can bear four times stress.
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