JEE Main & Advanced Physics Mathematical Tools, Units & Dimensions Question Bank Self Evaluation Test - Physical World, Units and Measurements

  • question_answer
    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) \[(PQ-{{Q}^{2}})/R\]

    Correct Answer: A

    Solution :

    [a] \[[P]\ne [Q]\] so, \[P-Q\]is not meaningful


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