Question:
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 – Q2)/R
(e) (R + Q)/P
Solution:
The correct answer is d) (PR – Q2)/R and e) (R + Q)/P