1. CH 5 – Electricity and Magnetism
Electrical Circuits
CH 5 – Electricity and Magnetism

2. What is Electricity?
Electrons flowing through a sample: dynamic electricity
Previously, we discussed static electricity, which is a buildup of electrons on a surface

3. Electrical Circuits
For electricity to flow, there must be a closed electrical circuit
Circuit def’n: movement (flow) of electrons through a closed pathway

4. Parts of a Circuit A circuit can contain:
Power supply: component which can generate or provide an electrical current in a circuit
Types: PV Cell, batteries, generator

5. Parts of a Circuit
2- Wires: metal thread that allows for the conduction (flow) of electrons
3- Switch or control: component that can open or close a circuit (controls electron flow)
Open switch: no current (electrons do not flow)
Closed switch: current present (electrons flow)

6. Parts of a Circuit
4- Fuses/breakers: protective device that cuts electrical current in a circuit in the event of an overload. The fuse melts (aka a blown fuse) and electricity stops flowing

8. Parts of a Circuit
4- Transformers: transfers electrical energy from one circuit to another. A transformer can also raise or lower the voltage
5- Resistors: component designed to limit the flow of electrons through an electrical circuit

9. Electrical Circuit Symbols
Resistor
Light Bulb
Wires
Open Switch
Closed Switch
Power Supply
Fuse
Voltmeter
Ammeter
Motor

10. Types of Circuits
Series

11. Types of Circuits
Parallel

12. Switch to other doc How to connect ammeter… (series)
voltmeter… (parallel)