Added: 1 year ago
From: PublicResourceOrg
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  • BEST OF THE BEST WHICH MAKES PHYSICS EASY

  • crystal clear explanation !!!

  • this lecture is clear as water

  • This video might be old, but I sure wouldn't say it's not good. One of the best videos I've seen so far!

  • • SandustanBrasov

    About the light from the electrical bulb the spacial brothers say us: "We see how the electrical ether -named of you electricity- how flow on the electrical wire on him above and it drain through the bulb's filament as in a watering can and give the seen light of you. This electrical ether is gathered by the yours generators through the rotor's rotation which attract thise particles from space, it condense them and send them through the yours wires as let will lighten on you.

  • pokerface radar LOL

  • Its a good vid but look at 19:27. The magnatic field have the wrong direction. U.S. Army ohohoh

  • Wow nobody ever explained all that like that to me before. awesome.

  • THIS VIDEO IS AWESOME I've known how Ac and Dc motors work but didn't really have a clear understanding of them.OUT OF ALL THE VIDEOS AND BOOKS I'VE READ THIS IS THE BEST THE keeps you from being confused all the time :D

  • Which among the playlists this video belongs?

  • can someone tell me why in this video he used the left hand to determine the flux around the wire???

    i mean when we use the thumb as the direction of the current as it goes away from us by right hand the field around the wire is the from left to right ( opposite direction that mentioned in this video )

    is it because he used the left hand ??

    if yes so is the using of the right or left hand depend on the country that you are studying at ?( for me in malysia) !!!!!....... i don't think so....

  • Self Excited :)

  • Why why why are these older videos so much better at teaching their concepts?

  • Comment removed

  • I've read maybe 20 or 30 books on dc motors and this is the best explanation I've ever seen.

  • Amazing! I had more than 25 years of experience in the electric field. But never ever I was taught or I could understand the real principle without this video, if the teaching could be in this fashion it could have given great ideas to our younger stage/ones. Fantastic presentation.

  • Kinda outdated, but VERY useful in brief explenation / terms!

  • 11:00 According the CORK SCREW RULE did the armature loop magnetic field shouldn't be in opposite direction?

    Sorry for my english.

  • really felt very good better than most of present lectures

  • amazing. very clear!

  • the presentation is really cut n clear .

  • Totally awesome. Who woulda thunk that old time videos would be so good. Makes me want to go watch a western.

  • @springgales western movies are really good! check out clint eastwood classics such as "fistful of dollars" or "for a few more dollars"

  • Good video and enjoyed the presentation.

  • I owe a debt of gratitude to the older generation for this......none of today's computer generated videos can match the quality of this instructional film....it's just so well presented and clearly explained.

    .., this old film taught me more about motors than any other crap videos put out on YouTube.

  • nice :D

  • 6:55 - 7:15 is badass

  • OMG we use this and I never thought this would be online!

  • hi, where can i find sountrack like in this documental?, ty

  • Simply superb .This video is made nicely such that it is not necessary to listen to class room lecture or refer to any book on dc machines

  • These videos are great, very more informative :)

  • I for one am a troll. There's evidence that electricity exists, but I'm going to say there's no evidence WHATSOEVER that "electricity" exists. Therefore, it must've been debunked. Anyone who believes this is real is correct, which is why I'm calling them all morons. I love to tell you what to believe for my own purposes, and I'm comparing my own arrogance directly with what I assume to be yours.

    Electricity can't exist. This is a scam. Don't be duped so easily.

    LOL at sane people.

  • excellent video from conceptual point of view.  zakir Rawalpindi Pakistan

  • This is very good

  • commutator converts ac to dc????

  • @coolbuddy613 yep

  • yep

  • subscribed !

  • Thank you past

  • Dc motors are awesome... FUCK AC!!!

  • best best best video i ever saw on you tube

  • At 19:27, doesn't the flux around the conductor follow right hand rule, i.e. current flowing away has clockwise flux and current flowing towards has anticlockwise flux? It seems they got it the other way round, or am I mistaken?

  • @JaySmith91 Yeah i noticed that too.

    The right hand conductor rule where your fingers point in the direction of flux and your thumb points in the direction of current flow is opposite here.

    Also flemmings right hand rule for generators and left hand for motors doesn't work because of the mistake with the current flow through the conductor.

  • @JaySmith91 It depends on if you use electron flow for current of if you use conventional flow.

  • They don't teach motors like they used to

  • Amazing, the best description out there. Easy to understand.:)

    Very satisfied.

  • you can say I've been totally "out of phase" with my machines' teacher but after watching this....BRAVO!! you really saved my grades :p ^_^

  • maaaaaan I love these old videos!

  • Absolutely wonderful videos. They're more fun and educational than most other videos I have seen so far. I am currently learning how motors, generators and electricity work as a whole and your videos are exactly what I needed. Keep them coming.

  • HATS OFF TO VINTAGE TEACHING

  • HATS OFF TO VINTAGE TEACHING

  • I like these videos, really practical and one can easily pick the ideas

  • Thank you very much, that was very helpful.

  • thank GOD!!..my whole 2units are covered in this 35min. video......

  • This video is extremely precious

  • nothing beats vintage lectures

  • @manheater I agree... many times the simple is best for explaining / exploring different subjects . Remeber... they didn,t have PowerPoint, I pads , Internet back then.

  • 1000 times better then the cramed lectures if nptel oot india...

  • This video makes it so easy to understand!

  • @MassiveArseMastaz I totally agree with you !

  • Super!! The best video about DC motors and generators  I've ever seen.

  • Wonderful!

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