Class 11 Physics is where everything changes. Concepts get abstract — gravity becomes an inverse-square law, fluids develop pressure gradients, sound waves acquire frequency and speed. A textbook diagram can only go so far. You need to see the numbers move in real time.
That is exactly what SPYRAL's free online physics simulations do. Each experiment is mapped to the NCERT Class 11 Physics syllabus so you open the right tool for the right chapter — not a generic PhET link, but a simulation built around how CBSE frames the question.
33+
Physics simulations available
15
NCERT Class 11 chapters covered
0
Downloads or installs needed
Free
No login to explore
Why Virtual Simulations Work for Class 11 Physics
Most school physics labs are limited by equipment, time, and the 40-minute period. A real pendulum experiment takes 30 minutes to set up and gives noisy data. The virtual version lets you change gravity, string length, and mass in seconds — and graph the result instantly.
NEP 2020 explicitly requires inquiry-based learning. Running a simulation is inquiry: you form a hypothesis, change a variable, and observe the outcome. It is the same scientific method your teacher is trying to demonstrate, compressed into something you can do at 11 PM the night before your unit test.
"You understand g = 9.8 m/s² when you drag the slider and watch the projectile arc change. Not before."
CBSE Class 11 Physics Syllabus — Chapter Map
The NCERT Class 11 Physics syllabus has 15 chapters split across two terms. Here is how each chapter maps to the simulations available on SPYRAL:
| Ch. | Chapter Name | Simulation on SPYRAL | Status |
|---|---|---|---|
| 1 | Physical World | — | Theory |
| 2 | Units and Measurements | — | Theory |
| 3 | Motion in a Straight Line | Force Visualizer | Live |
| 4 | Motion in a Plane | Projectile Motion | Live |
| 5 | Laws of Motion | Friction Explorer | Live |
| 6 | Work, Energy and Power | Force Visualizer | Live |
| 7 | Systems of Particles and Rotational Motion | — | Coming |
| 8 | Gravitation | Gravity Simulator | Featured |
| 9 | Mechanical Properties of Solids | — | Coming |
| 10 | Mechanical Properties of Fluids | Fluid Pressure & Buoyancy | Featured |
| 11 | Thermal Properties of Matter | — | Coming |
| 12 | Thermodynamics | — | Coming |
| 13 | Kinetic Theory | — | Coming |
| 14 | Oscillations | Doppler Effect | Live |
| 15 | Waves | Doppler Effect | Featured |
The 3 Featured Simulations — How to Use Them
Three simulations are especially effective for Class 11 board preparation. Each one is mapped to a high-weightage chapter and designed around the exact NCERT questions examiners ask.
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Chapter 8 · Gravitation
Gravity Simulator
Visualise gravitational force, orbital velocity, escape velocity, and Kepler's laws — all in one interactive canvas.
- Change mass of two bodies and watch force update via Newton's law: F = Gm₁m₂/r²
- See how orbital radius affects period (Kepler's third law — T² ∝ r³)
- Explore escape velocity — what happens when you exceed √(2GM/R)
- Visualise free-fall vs weightlessness in orbit
CBSE Class 11 · Chapter 8 · 7 marks weightage
Board Exam Tip — Gravitation
CBSE commonly asks: "Derive the expression for orbital velocity of a satellite" or "Compare gravitational acceleration at the poles vs equator." Use the Gravity Simulator to build intuition for r-dependence first, then write the derivation — your answer will be structurally correct because you actually understand what changes and why.
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Chapter 10 · Mechanical Properties of Fluids
Fluid Pressure & Buoyancy
Explore Pascal's law, Archimedes' principle, and Bernoulli's equation with real-time pressure visualisation.
- Change fluid density and observe how pressure at depth changes: P = P₀ + ρgh
- Submerge objects of different densities — see buoyant force calculated live
- Pascal's law: apply pressure at one point and watch it transmit equally in all directions
- Bernoulli's principle: vary tube cross-section and track velocity vs pressure trade-off
CBSE Class 11 · Chapter 10 · 8 marks weightage
Board Exam Tip — Fluids
The most common 5-mark question in this chapter: "A wooden block of density 600 kg/m³ floats in water. Find the fraction submerged." Run the buoyancy simulation before attempting this numerically — once you see the block stop sinking at exactly the right depth, the formula ρ_block / ρ_fluid becomes obvious instead of memorised.
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Chapter 15 · Waves
Doppler Effect Simulator
Hear and see frequency shift as source or observer moves. Visualise wave compression and stretching in real time.
- Move the source towards/away from observer — watch wavefronts compress and stretch
- Apparent frequency formula plays out visually: f' = f × (v ± v_o) / (v ∓ v_s)
- See why an ambulance siren sounds higher when approaching, lower when receding
- Explore the Mach cone when source speed exceeds wave speed
CBSE Class 11 · Chapter 15 · 6 marks weightage
Board Exam Tip — Waves
Doppler questions always trap students with sign conventions — which direction is positive. The simulation resolves this in 2 minutes: observer moving towards source → frequency increases → numerator gets the + sign. You will never get the formula wrong again after watching it animate.
How SPYRAL Integrates with Your Class 11 Prep
These simulations are not standalone tools. They are embedded inside SPYRAL's NEP Workbench — which means every time you run a simulation, three things happen automatically:
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AI Challenges Generated
After each simulation session, SPYRAL's AI generates 3–5 CBSE-style questions based on what you just explored. Not generic questions — ones tied to the variables you changed.
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SPI Tracking
Your Student Performance Index updates in real time. See exactly which NEP 2020 competencies you're building — inquiry, reasoning, application — and where you have gaps.
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AI Teacher on Demand
Stuck on why the buoyant force equals ρVg? Ask the AI teacher mid-simulation. It explains using the exact numbers on your screen, not a textbook example.
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Progress History
Every simulation is saved with timestamps. Your teacher or parent can see which chapters you've practised and how your challenge scores have improved over time.
Tips to Get the Most Out of Physics Simulations
The 3-Step Method That Works
- Read the NCERT derivation first — even if you don't fully understand it. Know what formula you are trying to build intuition for.
- Run the simulation with one variable at a time — change only mass, or only radius, or only velocity. Isolate cause and effect.
- Write the board-format answer immediately after — while the visual is still in your memory. You will find derivations flow naturally because you understand what each term represents.
The biggest mistake Class 11 students make is treating simulations as entertainment rather than tools. Set a 15-minute timer. Open one simulation. Answer the AI challenges that follow. That is a complete study unit for one concept — more effective than re-reading the same page three times.
Frequently Asked Questions
Are SPYRAL physics simulations free for Class 11 students?
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Yes. All simulations can be explored for free without creating an account. Sign up free to unlock AI-generated challenges after each session, save your progress, and track your Student Performance Index across chapters.
Do these simulations cover the full CBSE Class 11 Physics syllabus?
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The high-weightage chapters — Gravitation, Fluids, Waves, and Motion — are covered with dedicated simulations. Chapters like Thermodynamics and Rotational Motion are in the pipeline. SPYRAL adds new simulations every quarter aligned to NCERT updates.
Do I need to install any software or plugin?
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No installation needed. Every simulation runs in your browser using standard web technologies — no Flash, no Java, no APK. Works on Chrome, Firefox, Edge, and Safari, on both desktop and mobile.
Can my school use SPYRAL for the physics practical period?
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Yes. SPYRAL is designed for both individual student use and classroom deployment. Schools get a teacher dashboard showing which simulations each student has run and how they performed on the AI-generated follow-up questions. Contact us at the Schools page to set up a free pilot.
How is SPYRAL different from PhET simulations?
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PhET is a general-purpose physics simulation library. SPYRAL's simulations are specifically mapped to CBSE/NCERT chapter numbers and board exam question patterns. After each simulation, SPYRAL generates AI-powered challenges in CBSE board format — so you practise the concept and the exam format together, not separately.
Start With One Simulation Today
You do not need to explore all 33 simulations in one sitting. The most effective approach: pick the chapter you have a unit test on, open the matching simulation, spend 15 minutes with it, then answer the AI challenges that follow.
If you have a test on Gravitation this week, open the Gravity Simulator now. If it is Fluids, try the Fluid Pressure lab. Each one is designed to give you a conceptual foundation that makes NCERT numericals feel obvious rather than arbitrary.
