Question

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R  
Assertion A: When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed. 
Reason R: A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container.
In the light of the above statements, choose the most appropriate answer from the options given below:

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

Answer 1

The Correct Option is A

The question involves the application of Pascal's principle, which is a fundamental concept in fluid mechanics. Let's analyze both the assertion and the reason to determine the correct answer.

1. Understanding Pascal's Principle: Pascal's principle states that a change in pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container. This principle is widely applicable in hydraulic systems.
2. Analyzing Assertion A: "When you squeeze one end of a tube to get toothpaste out from the other end, Pascal's principle is observed." When squeezing the tube, the pressure applied is transmitted through the toothpaste (considered as an incompressible fluid) to the other end, forcing the toothpaste out. This is a direct application of Pascal's principle.
3. Analyzing Reason R: "A change in the pressure applied to an enclosed incompressible fluid is transmitted undiminished to every portion of the fluid and to the walls of its container."
   This statement accurately describes Pascal's principle.
4. Evaluating the Relationship Between A and R:
   • Both A and R are correct statements.
   • R provides the correct explanation for A, as it describes the underlying principle that when pressure is applied at one point in a confined fluid, it is transmitted equally throughout the fluid, leading to the occurrence described in A.

Hence, the correct answer is: Both A and R are correct and R is the correct explanation of A.