Pressure at depth h in fluid: P = P₀ + ρgh. If depth doubles, pressure increase is: MCQ with Answer and Explanation

Pressure at depth h in fluid: P = P₀ + ρgh. If depth doubles, pressure increase is:
A. Half
B. Four times
C. Same
D. Double
Answer: Option D
Solution (By JKSSB Mock Tests)
Gauge pressure (excluding atmospheric) P_gauge = ρgh ∝ h. Doubling depth doubles gauge pressure. Total pressure P = P₀ + ρgh increases but not exactly double due to P₀ term. Question asks about pressure increase (ρgh part). Memory tip: 'Hydrostatic pressure ∝ depth'. Fundamental fluid statics concept frequently tested in competitive exams.

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