Principles of Technology

Electrical Resistance (4:3)

Video Study Guide


What does electrical resistance do?


How is electrical resistance like the flow of water through a dirty pipe?


What happens when an electron hits an atom of metal?


How do many lights and heaters work?


What is the formula for electrical resistance?


What is a light bulb?


What does resistance depend on?


Why don't we get a shock from a car battery?


Why does the cable guy need to put trunk amplifiers in the line?


How does a dimmer switch work?


What is the difference between a conductor and a resistor?


What are the units of electrical resistance, and what is the symbol?


What are semi-conductors?


What's wrong with the sign?


Return To Principles of Technology Index

Return to GeoMan's Home Page