1 / 14

# Science 9 - PowerPoint PPT Presentation

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

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about 'Science 9' - nash

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

Aim: Current Electricity

• Science Sizzler (Ashton, Connor)

• Van de Graff Generator Demo

• Current Electricity

• Bill Nye or Magic School Bus

• Next class

• A tool used to study electrical discharge

What is Energy? Electrical Energy?

Energy

= ability to do work

Electrical Energy

= 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!!

• The Steady Flow of Charged Particles is called an electrical current

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

Some Perspective:

• Most home electrical devices

have a current of less than 15 A.

• A wristwatch uses a current of only a tiny fraction of ampere

• Generating station produces thousands of amperes

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.

Circuitry

A

Circuits include:

A) An Energy Source

= Supplies electrons

B) A Conductor

= Material allowing flow of electrons

= A device that converts electrical energy to another form of energy (ex. heat or light)

D) A Switch (Optional)

= Closes and opens a circuit

B

D

Voltage (aka – ‘Potential Difference’)

A measure of how much electrical

energy each particle carries

Units = volt (V)

Voltmeters

• Red to Positive Terminal

• Black to Negative Terminal

SAFELY Working with Electricity