Q.

If speed V, area A and force F are chosen as fundamental units, then the dimension of Young’s modulus will be:

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a

FA−1V0

b

FA2V−2

c

FA2V−3

d

FA2V−1

answer is A.

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Detailed Solution

Using formulae for longitudinal stress,FA=YΔll, As stress is dimensionless,  ⇒Y=F.A−1
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