Physics And Measurement Question 85
Question: A small steel ball of radius is allowed to fall under gravity through a column of a viscous liquid of coefficient of viscosity . After some time the velocity of the ball attains a constant value known as terminal velocity . The terminal velocity depends on (i) the mass of the ball , (ii) , (iii) and (iv) acceleration due to gravity . Which of the following relations is dimensionally correct
[CBSE PMT 1992; NCERT 1983; MP PMT 2001]
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: A
Solution:
By substituting dimension of each quantity in R.H.S. of option
we get
This option gives the dimension of velocity.