1. Series and Parallel Circuits

2. Circuits
Can either be series or parallel.

3. Series Current only takes one path for electrons
Current flows through every part of the circuit

4. Lights in a Series

5. Series If you add a resistor (like another light):
Total resistance goes UP since all the current has must go through each resistor.

6. Adding Resistors to Series:
Current in the circuit will go DOWN (lights will dim)
If you remove a light bulb or one burns out—all go out!

7. Parallel Circuits Has at least one point where current divides
More than one path for current to flow
Paths are also known as branches

8. Lights in Parallel

9. Parallel: Total resistance goes down
If you add a resistor:
Total resistance goes down
Total current goes up when you add another path

10. Removing a Light Bulb
If you remove a light bulb or one burns out, the others stay on because the circuit is still closed.