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If P,Q,R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?A. `((P-Q))/(R)`B. `PQ-R`C. `(PQ)/(R)`D. `((PR-Q^(2)))/(R)` |
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Answer» Correct Answer - A Physical quantities having different dimesions cannot be added or subtracted. As P,Q and R are physical quantities having different dimensions, therefore tthey can neither be added nor be subtracted Thus, (a) can never be a meaningful quantitity. |
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