Question

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : Product of Pressure $(P)$ and time $(t)$ has the same dimension as that of coefficient of viscosity.
Reason R : Coefficient of viscosity $=\frac{\text{ Force }}{\text{ Velocity gradient }}$
Question: Choose the correct answer from the options given below :

• A. Both A and R true, and R is correct explanation of A.
• B. Both A and R are true but R is NOT the correct explanation of A.
• C. A is true but R is false.
• D. A is false but R is true.

Answer 1

Answer: (C)

Pressure and time
$P:\frac{N}{m^2},\text{ Time }:Sec$
$Pt=\frac{N\sec }{m^2}$
$\eta =\frac{F}{6\pi rv}:\frac{N}{m\cdot m/\sec }:\frac{N\sec }{m^2}$