Previous Year Question
Correct answer: A
Explanation
A hydraulic lift works on Pascal’s law: pressure applied to a confined fluid is transmitted undiminished throughout the fluid. The same pressure acting on a larger piston area produces a larger force, so option A is correct.
Formula
Step-by-step solution
Correct Answer
A — Pascal’s pressure Principle
Concept and Reasoning
A hydraulic lift works on Pascal’s law: pressure applied to a confined fluid is transmitted undiminished throughout the fluid. The same pressure acting on a larger piston area produces a larger force, so option A is correct.
Calculation / Key Relation
F1/A1=F2/A2
Exam Takeaway
Hydraulic force multiplication → Pascal’s principle.
Common Mistake
Do not use Bernoulli’s relation; the lift relies on pressure transmission, not velocity conversion.
Common mistake
Do not use Bernoulli’s relation; the lift relies on pressure transmission, not velocity conversion.
Exam tip
Hydraulic force multiplication → Pascal’s principle.
Quick method
Hydraulic force multiplication → Pascal’s principle.