U & D again

[ These qs r too easy I agree but there r some crunches in the ans given So i din't dare to take risk]

Which of the following functions of A & B is possibility correct if A & B possess diff dimensions?

(A) A/eA/B

(B) B/log(A/B)

(C) A/B

(D) B/eA+B

3 Answers

62
Lokesh Verma ·

c only....

1
abcd ·

yes its C only

Reason:

e and log are dimensionless hence if u have e raised to something then that something shud be dimensionless similarly for log u cannot have dimension enclosed

as A and B have different dimensions:
hence
(A) is wrong as A/B will have some dimension
(B) again follow (A)
(D)you can not have '+' operator in the power to which e is raised until each individual entity is dimensionless

i hope u get it!!

4
UTTARA ·

Ya ishan & Nishant Sir Thanks

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