Circuits & Electronics
📋 What it is
Electricity flows in a complete loop (a circuit); a switch breaks or completes the loop to turn something on or off.
🗣️ Coach says
Electronics starts with one idea: electricity only flows in a complete loop. Break the loop and the light goes off; complete it and it turns on. That’s all a switch does. Master the loop and you can make things light up, buzz and move.
🧠 Memory hook
Electricity needs a complete LOOP. A switch breaks or completes it.
😂 Giggle
What did the LED say when it finally turned on?
"I'm de-lighted!"
😲 Whoa!
A single AA battery pushes electricity around a tiny loop millions of times faster than you could ever move your hand.
✅ Quick check: Why does a light in a simple circuit turn off when you open (break) the switch?
Say your answer out loud first — then reveal.
Because electricity only flows in a complete loop — breaking the circuit stops the flow, so the light goes out.
The complete-loop idea is the foundation of all electronics.
🧪 Try it! (2 minutes)
Trace a loop with your finger: battery → wire → light → wire → back. That’s a circuit.