Electrical and electronic principles

What you'll learn

1. 1

   Imagine a water pipe — the pump pushes water around, just like a battery pushes electricity around a circuit.

2. 2

   In our water pipe idea, what does the battery act like?

3. 3

   Build a simple circuit — drag the battery, wires, and bulb to make the bulb light up.

4. 4

   Let's calculate the current in a circuit with a 6V battery and a 3Ω resistor.

5. 5

   What is the current if voltage = 12V and resistance = 4Ω?

6. 6

   Change the resistance in this circuit to make the bulb brighter — lower resistance means more current flows.

7. 7

   If you increase the resistance, what happens to the current?