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?
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