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If P,Q,R are physical quantities, having...

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)`

Text Solution

Verified by Experts

The correct Answer is:
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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