1. Current Electricity Mr. M. Couturier SNC1D

2. Current Electricity

3. Unlike static electricity which resides on the surface of an object (stationary) and will not move until a (usually an uncontrollable and unpredictable) discharge occurs; current electricity flows through a material, usually a conductor, in a controlled manner. Unlike static electricity which resides on the surface of an object (stationary) and will not move until a (usually an uncontrollable and unpredictable) discharge occurs; current electricity flows through a material, usually a conductor, in a controlled manner.

4. Current Electricity The most common use of current electricity is through insulated copper wires which send a constant flow of electricity from one point to another. The most common use of current electricity is through insulated copper wires which send a constant flow of electricity from one point to another.

5. Current Electricity In order for a flow of current electricity to occur, a closed circuit must exist so that a continuous path of electrons can pass. This is called an electrical circuit. In order for a flow of current electricity to occur, a closed circuit must exist so that a continuous path of electrons can pass. This is called an electrical circuit. http://health.howstuffworks.com/human- body/systems/circulatory/adam- 200078.htm http://health.howstuffworks.com/human- body/systems/circulatory/adam- 200078.htm

6. LOAD One of the main components of an electrical circuit is a load. This device converts electrical energy energy into other forms of energy such as: One of the main components of an electrical circuit is a load. This device converts electrical energy energy into other forms of energy such as: – Mechanical energy (fan, pump, lift) – Thermal or photonic energy (stove, heater, lightbulb)

7. SWITCH Current electricity is controllable partly because a switch is included within electrical circuit. A switch is either ON (or open or 1) or OFF (or closed or 0). The use of 0 and 1 is intended to illustrate binary language which is essential for electrical and computer engineering. Current electricity is controllable partly because a switch is included within electrical circuit. A switch is either ON (or open or 1) or OFF (or closed or 0). The use of 0 and 1 is intended to illustrate binary language which is essential for electrical and computer engineering.

8. SOURCE In order to PUSH the electrons into such that they flow in a current, we need a source of energy within the electrical circuit: In order to PUSH the electrons into such that they flow in a current, we need a source of energy within the electrical circuit: – A battery (chemical energ) – Solar panels – Generators (chemical, nuclear, hydro, thermal) – Windmills

9. CONNECTORS Since the electrical circuit MUST be completely connected to all its components, it requires connections in the form of electrical wires (for now) or conducting wires. Since the electrical circuit MUST be completely connected to all its components, it requires connections in the form of electrical wires (for now) or conducting wires. – Thought – imagine if energy could be transmitted in a CONTROLABLE wireless manner – no more wires!!!!!!

10. IN A NUT SHELL To create an electrical circuit you need: To create an electrical circuit you need: – A load (i.e. a toaster, a fridge) – A source (i.e. battery) – A switch (if it is to be controlled) – A connection to all the above (wires)

11. Homework Read 12.1 Introducing Current Electricity (pages 507 – 508) Read 12.1 Introducing Current Electricity (pages 507 – 508) Do questions 1-6 Do questions 1-6