Robot Power!
Loading simulation…
flagWhat you'll discover
- arrow_forwardExplain why a circuit must be a complete loop
- arrow_forwardUse a switch to turn a motor on and off
- arrow_forwardPredict what happens to motor speed when voltage goes up
- arrow_forwardTrace the path electricity takes from battery to motor and back
Electricity loves a loop
Electricity is a stream of tiny particles that flows from a battery, through wires, into a motor, and back to the battery. This round trip is called a circuit, which means "circle".
If the circle is broken anywhere — a loose wire, an open switch — the flow stops instantly and the motor goes quiet. In the simulation, flip the switch and watch the glowing dots: they only flow when the loop is complete!
The switch: a drawbridge for electricity
A switch is just a tiny gap in the circuit that you can open and close. Open the switch and the bridge is up — no electricity can cross. Close it and the bridge comes down — the current zooms around the loop.
Every light switch in your home works exactly the same way. When you switch on a light in your room, you are closing a circuit, just like in this lab.
Voltage: the push behind the flow
Voltage measures how hard the battery pushes electricity around the loop. A small 1.5V battery, like one from a TV remote, gives a gentle push. A 9V battery pushes much harder, so the motor spins much faster.
Try sliding the voltage up and down in the lab. More push means more current, and more current means more speed. But real engineers are careful — too much voltage can overheat a small motor!
Why robots care about power
Everything a robot does — thinking, sensing, moving — costs energy. Robot designers must choose batteries carefully: big batteries last longer but are heavy, small ones are light but run out fast.
In places where electricity comes and goes, like during load-shedding hours that Nepal used to have, hobby builders learned to be extra clever with rechargeable batteries and even solar panels. Saving power is a robotics superpower!