Question

From which of the following is the working of hydraulic machines based on?

(a) Pascal’s Law

(b) Newton’s Law of Cooling

(c) Law of Gravitation

(d) Ideal Gas Law

The question was asked in an interview.

I would like to ask this question from Fluids Mechanical Properties Pressure topic in section Mechanical Properties of Fluids of Physics – Class 11

Answer 1

The correct answer is (a) Pascal’s Law

To explain I would say: Pascals Law states that a pressure change at any point in the fluid is transmitted throughout the fluid such that the same change occurs everywhere. This is employed in hydraulic machines by varying cross-sectional areas at required places.