![Page 1: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/1.jpg)
Electricity and Electrical Circuits
![Page 2: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/2.jpg)
Chapter SectionsO 1 - Electrical Circuits
O 2 - Current and Voltage
O 3 - Resistance and Ohm’s Law
![Page 3: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/3.jpg)
1 - Electrical Circuits
Electrical CurrentO The flow of electricity through wires,
motors, light bulbs, and other devices
O Typically the flow of electrons
O Very dangerous – your nerves use electricity to function
![Page 4: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/4.jpg)
Electrical CircuitsO A complete path through which
electricity travels
O Wires in circuits are like pipes that carry water
![Page 5: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/5.jpg)
Electrical SymbolsO Circuit diagrams use
symbols to make drawing circuits simpler and easier
![Page 6: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/6.jpg)
Open and Closed Circuits
O Open circuit has a break which stops the flow of electricity
O Closed circuit has no breaks
O Switches and Circuit Breakers open and close a circuit
![Page 7: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/7.jpg)
2 - Current and Voltage
CurrentO Current is measured in
amperes (A)
O Current flows from positive to negative
O Current is the flow or motion of charges
![Page 8: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/8.jpg)
Measuring currentO Measured with an
ammeter
O The current must pass through the meter
O Can be either AC or DC, which we will learn about in Chapter 14
![Page 9: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/9.jpg)
VoltageO Measured in volts (V)
O Measures electrical potential energy
O A higher potential difference (more volts) means that more work can be done
![Page 10: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/10.jpg)
Measuring VoltageO Measured with a volt meter
O A multimeter can measure voltage, current, and resistance
![Page 11: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/11.jpg)
BatteriesO Use chemical energy
to create voltage.
![Page 12: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/12.jpg)
3 - Resistance and Ohm’s Law
ResistanceO The measure of how
strongly a wire or other object resists current flowing through it
![Page 13: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/13.jpg)
Measuring ResistanceO Measured in ohms (Ω = omega)
![Page 14: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/14.jpg)
Ohm’s Law
![Page 15: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/15.jpg)
Using Ohm’s Law
![Page 16: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/16.jpg)
Conductors and Insulators
O Electricity flows easily through conductors
O Electricity is blocked by insulators
O Materials in between these two are called semiconductors
![Page 17: Electricity and Electrical Circuits. Chapter Sections O 1 - Electrical Circuits O 2 - Current and Voltage O 3 - Resistance and Ohm’s Law](https://reader034.vdocument.in/reader034/viewer/2022051113/56649ddc5503460f94ad41e9/html5/thumbnails/17.jpg)
PotentiometersO A potentiometer is a
variable resistor that is used to control the flow of current
O Dimmer switches and volume controls are examples