Current Electricity

Veronica AugustUniversity of Phoenix

CMP 555: Designing and Producing Educational

TechnologyInstructor: Janet Luch

June 20, 2008

Objectives

• Learn: Circuits must be complete in order for them to work properly.

• Do: Identify the components of a complete circuit.

• SIF: You can create a complete circuit by selecting different conductors.

Introduction to Current Electricity

(Discovery Education, 2008)

Current Electricity

• Electricity runs many objects in our everyday life.

• What are some objects that use current electricity?

• Current electricity is the flow of electrons through a conductor (Furgang, 2004).

• How would life be different if we didn’t have electricity?

Current Electricity is All Around Us

(Discovery Education, 2008)

Circuits

• All current electricity flows through circuits.

• Circuits are closed paths where the electrons can flow through (Furgang, 2004).

• If there is a break in the circuit the electrons will no longer flow.

• Draw a picture of a closed and open circuit.

Circuits

• All circuits must include an electricity source like a battery, wires that are made from conductors, and something that needs electricity like a light bulb (Furgang, 2004).

Conductors

• Conductors allow energy to pass through freely. – Metals– Water– Heated Gases– Human Body

Insulators

• Insulators do not allow energy to pass through freely.– Glass – Rubber– Plastic– Wood

Switches

• Why do we have light switches?

• How do you think they work?

• The job of a switch is to open or close a circuit.

• Let’s look inside to see what is happening.

Current Electricty

(Discovery Education, 2008)

Switches

• http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/LightSwitch/LightSwitch.html

More Circuits

• Go to the following site and follow the directions on screen

• http://www.bbc.co.uk/schools/ks2bitesize/science/activities/conductors.shtml

What did you learn?

• Take the quiz to see what you have learned.

• http://www.bbc.co.uk/schools/ks2bitesize/science/tests/conductors.shtml

References

An Introduction to Current Electricity. Discovery Education(2008). Retrieved June 27, 2008, fromunitedstreaming: http://streaming.discoveryeducation.com/

CBBC. Science: Materials, circuits, and conductors interactive. Retrieved April 25, 2008, from http://www.bbc.co.uk/schools/ks2bitesize/science/activities/conductors.shtml

CBBC. Science: Materials, circuits, and conductors online quiz. Retreived April 25,3008 http://www.bbc.co.uk/schools/ks2bitesize/science/tests/conductors.shtml

Current Electricity. Discovery Education (2008). Retrieved June 27, 2008, fromunitedstreaming: http://streaming.discoveryeducation.com/

Electricity is a Form of Energy All Around Us. Discovery Education(2008). Retrieved June 27, 2008, fromunitedstreaming: http://streaming.discoveryeducation.com/

Furgang, K. (2004) Working With Electricity and Magnetism. New York, NY: Benchmark Education Company, LLC.

Harrison, D., M. (2007). Retrieved April 25, 2008, from http://faraday.physics.utoronto.ca/PVB/Harrison/Flash/LightSwitch/LightSwitch.html