For most materials the Young’s modulus is n times the rigidity modul

1.	For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5
Answer» (b) 3 For most materials, the modulus of rigidity, η is one third of the Young’s modulus, Y. η = \(\frac{1}{3}\)Y or Y = 3η ∴ n = 3.

For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5

Answer»

(b) 3 For most materials, the modulus of rigidity, η is one third of the Young’s modulus, Y.

η = \(\frac{1}{3}\)Y or Y = 3η

∴ n = 3.

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For most materials the Young’s modulus is n times the rigidity modulus, where n is (a) 2 (b) 3 (c) 4 (d) 5

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