Electricity & Magnetism - The Learning Circuit
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- čas přidán 18. 12. 2018
- Karen covers how moving electrons create magnetic fields, how materials can become magnetized, what materials make good magnets, how electricity can be used to make an electromagnet, and more. Connect with Karen on element14: bit.ly/2S712Kr
- Věda a technologie
That was very informative and to the point. Well done Karen. I was actually posting to reddit asking about the molecular difference between fe and no fe metals and this answered that pretty well.
A great knowledge source, a reminder of the basic fundamentals of Magnetism and its properties; use. in general.
Another awesome video! I love these! I also love the IT crowd shirt 😁
An example of this is used in Compact Cassette or Reel to Reel tape decks for recording music or with a very fast rotating heads to record video.
Always enjoy the learning circuit series. Thanks for this.
I hoped for a short info about demagnetizing, or degaussing like with the old CRTs. :) Cool vid though!
Magnets!! I have a magnet collection myself... Yep, I'm that guy lol beautifully put Karen :) I always love your teaching style. Very easy to understand. Sorry I can't comment as often as I'd like. I hope you all have very happy holidays and a happy new years :) I wish you all the best for 2019
Another awesome vid. Would love to see you do one on OP-AMPs.
Excellent video overall, but there's at least a few mistakes: gold and copper are diamagnetic, not paramagnetic. That's easy to demonstrate by dropping a magnet through a copper tube. It also makes sense that gold, silver and copper would be the same because they're in the same periodic group, which means they have a similar configuration of valence electrons.
Also (and you may have omitted this for the sake of simplicity), superconductors are perfectly diamagnetic, we just haven't yet found a material that superconducts at room temperature.
Thanks for the feedback :)
This got me interested, my headphones have magnets in the buds so they stick together when your not using them, I always wondered how the magnetism doesn’t interfere with the headphones.
Danny Richie speakers and headphones pass current through a voice coil. This coil generates its own magnetic field which opposes the field of the permanent magnet. This allows the diaphragm to move and provide audio
ccandrew111 I see! Thanks for clearing that up :D
Thanks, Karen!
Love your simplified teaching style. I feel if just watch it a few times, it'll soak in. Can you also do a video on RFID? Heard it involves separate magnetic field from static charge query signal, but not sure. Supposedly, prof. K. Meyl offers a kit o(at cost) to let experimenter prove answer themself. I'm scaredy-cat!
I love you
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