Physics 13.4.2g - Parallel Circuit Example

[mistbabe26]

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

[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]

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

[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

[lilonotstitch]

how is i=3. 3:00

[SInnerMario]

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

[bar2ful]

I have been using your material for a while now and i must say they are effective.Great Job!

[webjeff2002]

How did upi get the 3?

[RidleyE]

YOU'RE KILLIN THE GAME KID!!!

[thengillotri]

The resistance is correct but some calculations were skipped finding it out, R= V/I = 60 ohm /3 = 20 ohm insted of R= V/I = 120V / 6A = 20 ohm

I have great respect for you and you're teaching ability and you videos are pioneering in explaining physics phenomenons.

[kyleglover17]

I think what wazzok meant was when you calculated R = V/ I, you then said that V = 60Ω/ 3. It happens at 2:48 in the video.

p.s. thanks so much for your videos!

[deused]

Thank you for this! you saved my exam ;)

[derekowens]

Thanks. Can you elaborate? I'll try to get it fixed.

D.O.

[wazzok]

i think you made a mistake finding the resistance....