1. Circuits

2. Why can’t you use lightning to power electrical devices?
Lightning releases large amount of electricity.
Devices need CURRENT to flow.

3. What is electric current?
Continuous flow of electrons through a material

4. What is the rate of electric current?
Amount of charge that passes through a wire in an amount of time

5. Amount of charge flowing past a point each second
What is an Ampere or amp?
Amount of charge flowing past a point each second
Andre Marie Ampere

6. Wire A or Wire B. Wire A has more amps…
More amps means more electricity flowing
There is more charges (electrons) flowing in wire A than in wire B.

7. Does electric current automatically exist in a material?
NO WAY!!!
What does it need?
A specific and completed path to flow or follow

8. To produce electric current…
Charges must flow from one place to another

9. What is an electric circuit?
A complete, unbroken path through which electrons can flow

10. Why is a racetrack like an electric circuit?
Cars can flow in a complete loop. If a piece is missing the cars can’t move.

11. What would happen if a piece of the racetrack was removed?
Current couldn’t flow, so the cars couldn’t move.

12. Closed versus Open Closed Circuit Closed, complete, unbroken path
Open Circuit
Incomplete or broken path

13. What features do all circuits have?
Device run by electrical energy called a resistor
Source of electrical energy
Connected by conducting wire

14. What are the roles of the following in a circuit?
Energy Source
Makes charges move around or flow in a circuit
Resistor
Transforms electrical energy into something (like light)
Switch
Opens and closes the circuit

15. Racetrack

16. Racetrack

20. Symbols