Weber number involves which of the following? i. Inertial Force ii. Surface Tension Force iii. Viscous Force iv. Gravitational Force
- AOnly (i) and (ii)Correct
- BOnly (iii) and (iv)
- COnly (ii) and (iii)
- DOnly (i) and (iv)
Solution
Concept
Forces represented by the Weber number
Formula
NONE
Step-by-step solution
1. The Weber number is a dimensionless parameter defined as the ratio of inertial force to surface tension force. Answer: A
Explanation
The Weber number is a dimensionless parameter defined as the square root of the ratio of inertial force to surface tension force. It is used to analyze fluid flows where surface tension plays a significant role, such as in droplet formation. Therefore, option A is correct.
Why the other options are wrong
C) Option C excludes inertial forces which are essential components in the Weber number. D) Option D includes gravitational forces which define the Froude number instead.
Shortcut
Weber number (We) represents the ratio of Inertial Force to Surface Tension Force.
Common mistake
Confusing Weber number with Froude or Reynolds numbers by associating it with gravitational or viscous forces.
Correct answer: A) Only (i) and (ii)