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Q.

Which of the following combinations of three different physical quantities P, Q, R can never be a meaningful quantity?

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a

$PQ - R$

b

$\frac{PQ}{R}$

c

$\frac{P - Q}{R}$

d

$\frac{PR - Q^{2}}{QR}$

answer is C.

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Detailed Solution

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Two physical quantities of different dimensions cannot be added or subtracted

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