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  • A B C and D are four different physical quantities having different dimensions None of them is dimensionless But we know

A, B, C and D are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD = C ln(BD) holds true. Then which of the combination is not a meaningful quantity ? A. A^{2}-B^{2}C^{2} B. \frac{\left ( A-C \right )}{D} C. \frac{A}{B}-C D. \frac{C}{BD}-\frac{AD^{2}}{C}

Answers (1)

from the question it is clear that [AD]=[C] and [BD] is diamension less so [B]=1/[D]

option1 

[A^2]-[B^2C^2] and\ [A^2]=[(\frac{C}{D})^2]\ also\ [B^2C^2]=[(\frac{C}{D})^2]\\ If\ we\ check\ similarly\ for\ other\ options\ also\ we\ can\ find\ that\ option \ B\ and\ C\ is\ not\ meaningful

[A2] - [B2C2]and [A2] = If we check similarly for other also [B C ] = ions also we can find that ion B and C is not meaningful

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Safeer PP

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