Electronics 101 - Resistors & Resistance Part 1

Electronics Class - Room 101

Here I teach the novice all about electronics.

This is Part 1 in a series all about resistors and resistance.

I provide commentary while showing various type of resistors: carbon film, metal film, precision, variable, ceramic and wire wound. I also show a series parallel resistance network and measure the voltages with a voltmeter. Resistors vary in wattage. The wattage rating indicates the amount of power that can be dissipated by that resistor. At some point resistors burn out. Lower resistances burn out with high currents. High resistances burn out due to high voltage. Using Ohm's Law you can calculate circuit voltage, current and resistances. E=IxR I=E/R R=E/I. Ohm's Law is easy to use and remember because of a simple pie chart you can draw anytime. Cover the value you don't know and calculate the answer. Resistors always go 'open' circuit when they fail. A resistor can be anything the conducts electricity. Even wire has resistance. Hope you enjoy and learn a little something.

You can click on this link to watch Part 2 http://www.youtube.com/watch?v=zYra8Yp_DRA

©Copyright 2010 D.C. Boyce. Cranial Sponge Productions.

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[TechnoMaple]

thank you

[X2YeZCAMCNC]

@TechnoMaple You are welcome

[LAsalsero12]

Thank you very much for sharing. I learn alot. This video is so much better to understand than my lab physics class (which unfortunately I always fall to to sleep) haa haa haa

[X2YeZCAMCNC]

@LAsalsero12 Thanks for your comment and you are welcome

[89DrFunk]

Thank you very much for the videos! I am a newbie and I bought a cheap multimeter and didn't have a clue on how to use it now I'm okay with the basics. Ever thought about making a channel on YouTube millimeters for dummies with examples on the basics uses.

[KeithWasHere1]

so the difference between the 72 and 81 is what the resistors are giving off as heat?

[KeithWasHere1]

can someone verify for me? when something is ran in series the voltage changes but the amps stays the same and when something is ran in parallel the amps changes but the voltage stays the same?

[balasuriyage]

turn off the music mate

[bitbreaker]

Lol, that's what I get for not looking at the comments before posting... didn't see that question had already been asked.

[bitbreaker]

So what's the difference between a variable resistor and a potentiometer(sp?).

[troutmask1970]

great music in the background by the way.

[stuckinthecities]

What's the difference between the 100W variable resistor and a potentiometer? They are constructed the same.