Physics 13.4.2g - Parallel Circuit Example

A parallel resistor problem involving a heater and Joule heating. Deals with resistors in parallel and with Joule's Law. From the Physics course by Derek Owens

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Education

Tags:

• Physics
• resistors
• parallel circuit
• parallel resistors
• parallel circuits
• circuit example
• parallel circuit example
• Joules Law
• Joule's Law
• Joule heating
• resistors in parallel
• homeschool
• distance learning
• Derek Owens

[GuitarHeroHanz]

Thank You so much do you have a FaceBook??? [Please Reply ] =)

[derekowens]

@GuitarHeroHanz I do have a facebook account, but I'm not on facebook very often. Too busy with class, lessons, grading...

[brawl313]

hey, I'm curious about this. Is joule's law the same thing as finding the work? considering w=pt, and p=I^2R, thus w=I^2Rt, are they essentially, and H=I^2Rt is the same equation, does the heat given equal the work done?

[derekowens]

@brawl313 Yes, that is essentially correct.  If you have a machine, though, doing some work, it is typically converting electrical energy into mechanical energy, so the work done would actually be less due to some inefficiency, but yes I believe you have the right idea.

[song110beforgiving]

You guys commenting are both right in a way; there are 2 missteps.

First; he went from 120/6 to 60/3 without showing the reduction of the fraction.

Second; he labeled it Ohms when it should have been Volts, Volts/Current=R.

I believe I said that correctly; usually his videos are very good, maybe he was in a hurry on this one.

[derekowens]

@song110beforgiving Thanks. I'll check on that and put that on my list of things to do.

DO



[SInnerMario]

@lilonotstitch it's not , he made a mistake , it is suppose to be 120V/6A = 20 Ohms

[mistbabe26]

Your videos have made things so much clearer and its so much better than reading a boring FAT textbook. Thank you !

[brawl313]

thanks for replying, I'll be watching a lot of your videos now that my physics 2 class begins in the fall..

[lilonotstitch]

how is i=3.  3:00