Physics And Measurement Question 145
Question: Which of the following quantities is dimensionless?
[MP PET 2002]
Options:
A) Gravitational constant
B) Planck’s constant
C) Power of a convex lens
D) None
Show Answer
Answer:
Correct Answer: D
Solution:
$ [G]=[{{M}^{-1}}L^{3}{{T}^{-2}}];[h]=[ML^{2}{{T}^{-1}}] $
Power = $ \frac{1}{\text{focal length}}=[{{L}^{-1}}] $
All quantities have dimensions
