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Formula Sheet

Properties of Fluids

NIOS · Class 12 · Physics

All formulas from Properties of Fluids in NIOS Class 12 Physics. Key equations, constants, and identities for board exam preparation.

44 questions40 flashcards5 concepts

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A diagram illustrating the concept of pressure as force acting normally per unit area on a surface submerged in a fluid.
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12 Formulas · 4 Sections

Formulas

Hydrostatic Pressure

P = F/A (Pressure = Thrust / Area)

P = ρgh (Hydrostatic pressure at depth h)

P₁ - P₂ = ρgh

P_atm = hρg = 0.76 × 13600 × 9.8 ≈ 1.01 × 10⁵ Pa

Buoyancy and Archimedes Principle

Buoyant Force B = Weight of fluid displaced = ρ_fluid × V_submerged × g

Condition for floating: Weight of object = Buoyant force → ρ_object × V_total × g = ρ_fluid × V_submerged × g

Pascal's Law and Applications

F₂ = F₁ × (A₂/A₁)

P = F₁/A₁ = F₂/A₂ (Pressure is same throughout enclosed fluid)

Surface Tension

T = F/L (Surface Tension = Force per unit length)

T = W/A (Surface Tension = Work done / Increase in surface area)

Excess pressure inside Liquid Drop: P = 2T/r

Excess pressure inside Soap Bubble: P = 4T/r

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Frequently Asked Questions

What are the important topics in Properties of Fluids for NIOS Class 12 Physics?
Key topics in Properties of Fluids include Mind map showing all major topics covered in the chapter on Properties of Fluids, Flowchart showing the derivation logic for hydrostatic pressure formula step by step, Step-by-step solution flowchart for the dam wall thickness numerical problem. These are the concepts NIOS Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Properties of Fluids — NIOS Class 12 Physics?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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