Science 9. Aim: Current Electricity. Agenda. Science Sizzler ( A shton, Connor ) Van de Graff Generator Demo Current Electricity Bill Nye or Magic School Bus Next class. Van de Graff Generators. A tool used to study electrical discharge. What is Energy? Electrical Energy?. Energy
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Aim: Current Electricity
= ability to do work
= energy of charged particles
= transferred when electrons travel from place to place
Static Electricity is not useful in operating electrical devices…why?
Because charge particles are stationary(build-up & discharge).
Electrical devices need a constant flow of charged particles!!
This flow will continue if:
1) There is an energy source
2) There is a complete circuit or pathfor the particles to flow through
- - - - - - - - - - -
The rate at which an electrical current flows is measured in Amperes (A), or “Amps” for short
have a current of less than 15 A.
The energy carried by charged particles
Need to get electricity from its source (ex. hydro dam) to where it will be used (ex. homes)
Materials that allow for an electrical charge through it easily are called CONDUCTORS
A circuit is a path that controls the flow of electricity.
In most electrical circuits, the path in which the electrons flow is made of solid metal wires…
…but circuits can also include gases, fluids, and other substances.
A) An Energy Source
= Supplies electrons
B) A Conductor
= Material allowing flow of electrons
C) A Load
= A device that converts electrical energy to another form of energy (ex. heat or light)
D) A Switch (Optional)
= Closes and opens a circuit
A measure of how much electrical
energy each particle carries
Units = volt (V)
Read Pages 284 -287
& Answer questions 1 – 9 on 287