1. And more practical uses of electricity
Electronics…
And more practical uses of electricity

2. Current types:
Alternating current (AC)
Direct current (DC)

3. Electrical Functions 1. Power supply: 2. Conduction:
Supplies energy to the circuit
Examples: Battery, power supply, photovoltaic cell
2. Conduction:
Ability to transfer electrons

4. Factors that affect conduction
Length:
The shorter the wire the better the conductor
Diameter
The wider the wire the better the conductor
Temperature
The colder the wire the better the conductor
Nature of the material
A metal is better than a metalloid (carbon) which is better than a non-metal

5. 3. Protection:
Element whose goal is to protect the circuit in case of a surcharge

6. a) Fuse

7. b) Breaker

8. Electrical functions continued
4. Insulation:
Element whose function is to slow down the electrical current

9. a) Resistors

10. p.468

11. Electrical Functions 5. Control
Component that has the ability to control the flow of electricity in a circuit
Flip flop switch, lever switch, push button, magnetic switch

12. Defining switches
UniPolar vs. Bipolar
Unidirectional vs Bidirectional

13. Electrical Functions 6. Transformation of energy
Any component that has the ability to transform electrical energy into another form of energy (heat, light, magnetism, vibration)

14. 7. Relay
Function: Element that uses a small amount of power to switch another circuit which requires a larger amount of power

15. 8. Condenser (Capacitor)
Function: Stores energy
Allows to even out current fluctuations
Allows to discharge stored energy in one shot (e.g. camera flash)

16. 9. Diode Allows the current to flow in only one direction
Has low resistance one way, incredibly high resistance the other)
Converts Alernating current into direct current

17. 10. Transistor Function: Amplifies an electronic signal
Used in computers – binary code