Electronics

What you'll learn

1. 1

   Imagine a simple circuit: a battery, a bulb, and a wire. The battery pushes electrons around the wire, like a pump pushing water through a pipe.

2. 2

   What does the battery do in a circuit?

3. 3

   Drag the components to build a working circuit: battery, bulb, and wire.

4. 4

   Let's work out the current in a circuit with a 12V battery and a 4Ω bulb.

5. 5

   Using Ohm's Law, what is the current if V = 9V and R = 3Ω?

6. 6

   Change the resistance slider to see how it affects the current in a 12V circuit.

7. 7

   What happens to current if resistance increases (voltage stays the same)?