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Question 30974
JEE Physics · Hard

Fluid Mechanics: Pressure MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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PressureHardQuestion 30974

Question

In a U-tube with two immiscible liquids (ρ₁, ρ₂) at equilibrium, the heights h₁ and h₂ are related by:
  1. A
    ρ₁h₁ = ρ₂h₂
    Correct
  2. B
    ρ₁/h₁ = ρ₂/h₂
  3. C
    h₁ = h₂
  4. D
    ρ₁h₂ = ρ₂h₁

Correct answer

ρ₁h₁ = ρ₂h₂

Explanation

Pressure balance at the liquid-liquid interface: ρ₁g h₁ = ρ₂g h₂ → ρ₁h₁ = ρ₂h₂.

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