Force and motion
Force and Motion
Add a Switch to a Circuit
The video above and the diagram below show how to insert a switch in a circuit consisting of a LED and battery. The switch interrupts the flow of current when it is open, so no current can flow. It is like removing one of the ramp sections of the Penguin Race toy. The electric current be able to return to the battery when the open switch is breaks the circuit, just as the penguins won’t be able to return to the escalator when the ramp is broken. When the switch is closed, it connects the LED directly to the battery, allowing the current to flow.