STANDARD Physics Dimensional Analysis MCQ Question
If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?
P + Q R
PQ - R
PQ / R
(PR - Q²) / R
Correct Answer
Detailed Explanation
Physical quantities having different dimensions cannot be added or subtracted. As P, Q and R are physical quantities having different dimensions, therefore they can neither be added nor be subtracted. Thus, (a) can never be a meaningful quantity.
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