1. ELECTRICAL ENGINEERING

2. ELECTRICAL ENGINEERING RELATES BOTH ELECTRICITY AND ELECTRONICS

3. Conventional Current vs Electron Flow

4. ELECTRICAL CIRCUITS
CONVENTIONAL CURRENT FLOWS FROM POSITIVE TERMINAL TO NEGATIVE TERMINAL
ELECTRON FLOW OCCURS FROM THE NEGATIVE TERMINAL (WHERE THERE IS AN EXCESS OF NEGATIVE ELECTRONS) TO THE POSITIVE TERMINAL (WHERE THERE IS A LACK OF ELECTRONS)

5. ELECTRONIC VS ELECTRICAL
MADE WITH SEMICONDUCTOR MATERIAL
USUALLY SILICON
EXAMPLES-DIODES, TRANSISTORS, RECTIFIERS, SUPRESSORS
ELECTRICAL
MADE WITH CONDUCTOR MATERIAL
METALS AND ALLOYS
EXAMPLES- WIRES, SWITCHES, FUSES

6. ALLOY
A homogeneous mixture made by fusing two or more metals, or a metal and a nonmetal
To obtain desirable qualities such as hardness, lightness, and strength
Brass is a mixture of zinc and copper

7. SYMBOLS FOR CIRCUIT DIAGRAMS
BATTERY
AC POWER SUPPLY

8. DIODE
LED

9. TRANSISTOR
SWITCH

10. RESISTOR
OTHER SYMBOLS PAGE 460 OBSERVATORY

11. DIRECT CURRENT UNIDIRECTIONAL FLOW OF ELECTRIC CHARGE
ELECTRONS MOVE CONTINUOUSLY IN THE SAME DIRECTION

12. ALTERNATING CURRENT
Alternate current is: an electric current in which the electrons move back and forth in a regular pattern.
Vibrating motion of electrons allow current to flow.

13. POWER SUPPLY
PROVIDES THE ENERGY THAT CAUSES THE CURRENT TO FLOW THROUGH THE CIRCUIT

14. ADVANTAGES AND DISADVANTAGES OF A BATTERY
A battery is a device that transforms the energy from a chemical reaction into electrical energy.
Advantages: Products that run on a battery are portable
Disadvantage: Batteries have to eventually be replaced. Plus, the chemicals inside a battery are an environmental hazard and leak heavy metals and acids into our environment.
Examples: MP3 players, watches, remote controls

15. ADVANTAGES AND DISADVANTAGES OF AN OUTLET
An outlet is designed to have metal prongs in constant contact with an electrical network
Advantages: Stable and long lasting power supply. It also creates very little greenhouse gases (as BC Hydro uses water to produce electricity)
Disadvantage: Appliances are needed to be in constant contact with the outlet and has minimal movement.
Examples: TV, Fridge, Computers

16. ADVANTAGES AND DISADVANTAGES OF A PHOTOVOLTAIC CELL
A photo cell (solar cell, or solar panel) generates an electrical current when exposed to light (sun).
Advantages: They can create electrical power to an electric grid, and they can create power on portable devices. They do not produce greenhouse gas emissions and have a life span of 20 – 30 years
Disadvantage: Is dependable on the sun. They are also very expensive to install.