Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?

If P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?

a) \frac{(P - Q)}{R}

b) PQ - R

c)\frac{ PQ}{R}
d)\frac{ (PR-Q^{2})}{R}

e) \frac{(R + Q)}{P}

Answers (1)

The answer is the option a) \frac{(P - Q)}{R}  and  e) \frac{(R + Q)}{P}

Explanation:

(i) The different physical quantities (P-Q) & (R+Q) in option a & e and never be added or subtracted. Thus, they will be meaningless.

(ii) In opt (d), dimensions of PR & Q^{2} may be equal.

(iii) in opt (b), the dimension of PQ may be equal to the dimension of R.

(iv) There is no addition or subtraction, which gives the possibility of opt (c).

Hence, opt (a) & (e).

Posted by

infoexpert22

View full answer

Similar Questions

Latest Question