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For a perfect rigid body, Young’s modulus is

(a) zero

(b) infinity

(c) 1

(d) –1

2
its inifinity

b, its infinity

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(a) zero

(b) infinity

(c) 1

(d) –1

its inifinity

b, its infinity

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body is perfectly rigid hence change in length = 0

strain = 0

young modulus = ∞

hence option (b) is correct