⚡ Ohm's Law Playground

Discover how electricity behaves by playing with Voltage, Resistance and Current.

🔌 Live Circuit

− + 12V SWITCH 6Ω LED I = 2.00 A
I = V ÷ R
Example: 12V ÷ 6Ω = 2.00A
⚠️ Too much current! The LED may burn out — try lowering voltage or raising resistance.
2.00 A
Current Bar2.00 A
NormalMediumHigh

🧪 Ready-Made Experiments

🔬 Formula Lab

🎯 Challenge Mode

Can you calculate the Current in your head?

V = 12V, R = 4Ω

🚗 Electricity is Like Cars

🔌 View
Story — garage, road, gate, house
🚧 Gate (Switch)
Open — cars can drive through
🏠 House (LED) 🔋 Garage (Battery) 🚧 Gate (Switch) 🐢 Speed Breaker (R)
🔋 Battery → GarageWhere the electric "cars" start their trip.
🛣️ Wire → RoadThe closed path the cars travel around.
🚗 Electrons → CarsTiny travellers carrying energy around the loop.
🐢 Resistance → Speed BreakerHigher resistance = cars slow down more.
🏠 LED → HouseWhere the cars deliver their energy — it lights up.
🚧 Switch → GateClosed circuit = gate open = cars can go.
⚡ Voltage → Engine PowerHigher voltage = cars drive faster.
🔢 Current → Traffic FlowHow many cars complete the loop each second.

📝 Ohm's Law Quiz

🎮 Mini Games

🔧 Circuit Builder

Build a Series, Parallel, or Series-Parallel circuit — or design your own in Build Yourself. Tap any component (resistor+bulb) to insert or remove it, and tap the switch to open or close the circuit.

✨ Fun Facts About Electricity

Click the button for a fact!

🧑‍🏫 Teacher Notes

Learning Objectives

  • State Ohm's Law: I = V / R
  • Explain how voltage and resistance each affect current
  • Read a digital and needle ammeter
  • Connect abstract formula to a real circuit

Questions to Ask Students

  • What happens to current if we double the voltage?
  • Why does the LED glow brighter with more current?
  • Why might too much current be dangerous?

Common Misconceptions

  • "Voltage flows through wires" — actually current flows; voltage is the push.
  • Students often think resistance and current increase together — they're inversely related.
  • Current is "used up" — actually it's the same throughout a series circuit.

Real Life Examples

  • Phone charger: low voltage, controlled current
  • Torch: small battery driving a small bulb
  • Car battery: high current for the starter motor