At the following link I have arranged 157 videos in an order that will take you from vectors to electromagnetic waves. Many of the videos come from this channel but a few from another private channel I have. On some Browsers you may have to copy and paste the links
There are about 50 demonstrations to illustrate concepts. These demonstrations are built from ordinary items, many you might find around your (house, paper clips, batteries, magnets), at a hardware store, or on-line. Details of constructing the demonstrations are included. Examples are demos of electrostatic and electromagnetic induction, construction of a battery, simple motors, generation of magnetic fields from current carrying wires, a simple ac generator, construction of a loud speaker from a paper cup, magnetic braking, demonstration of Young’s double slit experiment, Spark coils, etc.
Professor, for the single loop magnetic field, what does it look like when the angle of rotation is moved 90 degrees and the loop is flush with the plastic plane?
The field would be pointing into the plastic. I believe you would not see any change in the random arrangement of iron filings as they wouldn't be able to turn into the plastic. Interesting idea. It might be like this, ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QaZ0h76X6d0.htmlfeature=shared
So I was playing with a Van degraaff generator 40 years ago ( and the discharge spark was about 11 inches) I put out my fist and let it discharge on the tip of my (bird finger) knuckle about 8-10 times and the next day I had a water blister 1/4" x 1/4" in the same spot. I guess the spark made quite an impact.
3:43, why there is no electric field inside the conducting plate due to the "static situation"? Also, the electrons move initially (until the electrons move) due to induction, causing current flow (top to bottom) right?
I took fuses, heated the ends to pull the caps off as the glass pipes. Any wire would work and the batteries are just anything that will turn the motor. The faster it turns the quicker it would charge up. For this one I used two AA batteries.
Take a look at the turboelectric series. The metals close to copper can replace copper and those close to zinc can replace zinc. So aluminum and zinc would work about the same. Metals further apart would probably work even better.
That is one I actually want to do. I started to build one a couple of years ago but it didn't work. I haven't had a chance to get back to it to figure it out. I will, but it might not be till next summer.
Excellent description of the working process of electron movement and ionisation energy. I really liked the clear and informative presentation. I wish I was one of your students.
Yay. A.straight to the content.No begging for likes/etc.. B.Great simple audio. C.Clear diction from the presenter throughout D.All the bits laid out so we can see what is being used and assembled in realtime. .....😺even my moggie was watching. well done.
I like your video! Here's a youtube video I want to share with you and everyone! The title is : Continuous Electric Display (CED) In this video, I will do a short demonstration of a new analog display technology, made with static electricity.
How does a battery operated magnetic pump work? There must be an aluminum showing between the coupled magnets, so how do they get around the Eddie current problem and keep their efficiency?
@@electricandmagneticfields2314 Oh man that would make a great video! Basically you can magnetically couple a motor to a shaft radially through a housing so there are no shaft seals which is a huge advantag for a lot of reason. However, there are a few tricks to maximize coupling and minimize eddie currents I'm still trying to understand. Advanced Diver Propulsion Vehicles also use them since shaft seals are the biggest risk to flooding a housing: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-eufuhWX-ZjM.htmlsi=SGjZJTR_Idv97WEf&t=19 ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-IAkxS1xVraw.html
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It was actually a gift. I found one on Amazon for $12.99, www.amazon.com/Stemclas-Electric-Lightening-Sensitive-Decorations/dp/B08L5Z2Q49/ref=sr_1_8?crid=HIORR4MU917E&dib=eyJ2IjoiMSJ9.9xViOTRFhHjF4gU-SuJEfj6lOTVpP4vYXbbUt7ofSpcWo_Fsjc92DdoeTznJ_R2kTKMX0J2Zezt9Qy3mmGaXkvuXbldI_8qHKbopu993zJlAARCyKRxotAXBU-N_6Z3PXbrh1daIkgBqQ0RedzqZK44VTrwAJ7GOK2yPTwJsnGNPcTv4bBB0ympNqQ5zM81Ne_eNIzaDsYEwP76ssPSkeNElLADZWzzV__7P2GA4LoLcE18l-mncRlfyOiTQbOYXgSFN_NkOkGakCnt492VmxyH5AwClcVshHxZp4orOFPI.s7mEXmhff-KPZYsm4-wnM2zvH_EiaO5tQhs0tt2t7Bw&dib_tag=se&keywords=plasma+globe&qid=1720530084&sprefix=plasma+globe%2Caps%2C155&sr=8-8
A very long time. It depends on the leakage current through the glass insulator. I am guessing for years. That is why capacitors in electronics like old CRT TVs and microwaves can be dangerous.
I notice that in vulcanic storm there are more thunder than a rainy storm, due to the amount of ash and powder, so i wonder if this experiment could work using sand or ash instead of water. ? ?
Elektromanyetik indüksiyonu Michael Faraday'ın gerçekleştirdiği bir deney benzeriyle göstereceğim. Burada bir ampermetre ve üç bobinim var. Bir döngülü, on döngülü ve yüz döngülü bobinlere sahibim. Ayrıca bir çubuk mıknatısım var ve ilk olarak tek döngülü bobini ampermetreye bağlayarak başlayacağım. Şimdi tek döngülü bobin ampermetreye bağlı ve çubuk mıknatısı bobinin içine sokup çıkaracağım, çok yakından izlerseniz ampermetre ibresinde hafif bir sapma görebilirsiniz. Şimdi on döngülü bobini bağlayayım ve aynı şeyi yapacağım. Çubuk mıknatısı bobinin içine sokup çıkarıyorum, şimdi ibrede daha fazla hareket görebilirsiniz. Gerçekten çok yavaş hareket ettiğimde küçük bir sapma görüyorsunuz ve hızlı hareket ettiğimde daha büyük bir sapma görüyorsunuz. Ayrıca mıknatıs içeri girdiğinde ibre sağa sapar ve dışarı çıktığında sola sapar, ancak mıknatıs hareket etmediğinde akım olmadığını gösteren herhangi bir sapma olmaz. Dolayısıyla manyetik alan bobine girdiğinde pozitif akım akar, bobinden çıktığında ise negatif akım akar. Şimdi yüz döngülü bobini bağlayayım. Mıknatısı çok yavaş hareket ettirdiğimde sağa sapma görüyorsunuz, dışarı çıkardığımda ise sola sapma. Hızlı hareket ettiğimde ise çok daha büyük bir sapma görüyorsunuz. Yani manyetik alanın değişim hızı akımı etkiler. Gördük ki bobindeki dönüş sayısı arttıkça akım artar, dolayısıyla akım dönüş sayısına orantılıdır. Ayrıca manyetik akı değişiminin hızı arttıkça akımın da arttığını gördük. Şimdi eğer devrenin toplam direncini izleseydik, yani bobinin, tellerin ve ampermetrenin direncini, akımın devrenin toplam direncine ters orantılı olduğunu bulurduk. Bu denklem genellikle i = -n / R decide ET olarak yazılır ve bu eksi işaretinin Lenz yasası hakkında gelecekteki bir videoda anlamını tartışacağız. Dolayısıyla denklemin her iki tarafını R ile çarptığımızda R I = -n decide ET ve direnç ile akım bir gerilim veya potansiyel oluşturur, buna elektromotor kuvvet denir ve elektromotor kuvvet -n decide ET olarak eşitlenir ve bu Faraday'ın yasası olarak bilinir.
I am going to demonstrate electromagnetic induction with an experiment similar to the one that michael faraday performed. I have an ammeter here and i have three coils. I have a coil with one loop ten loops and 100 loops. I also have a bar magnet and i will start by connecting the singel loop coil to the ammeter. I now have the single loop coil connected to the ammeter and i am going to move the bar magnet into and out of the coil and if you watch very closely you can see a slight deflection of the ammeter needle okay so now let me connect the ten loop coil. Then i am going to do the same thing. I am going to move the bar magnet in and out of the coil now you can see more movement of the needle in fact if i go very slowly you see just a little bit of a deflection and if i go quickly you see a greater amount of deflection also as the magnet is going in the needle deflects to the right and as i pull the magnet out it deflects to the left but when the magnet isn't moving there's no deflection indicating no current flowing. So when the magnetic field is changing going into the coil there's a positive current flowing when it's changing coming out of the coil there's a negative current flowing and now let me connect the hundred loop coil. I will start by moving the magnet in very slowly you see a deflection to the right pull it out to the left if i go in quickly you see a much greater deflection. So the rate of change of the magnetic field affects the current. We saw that as the number of turns in the coil increase the current increase so the current is proportional to the number of turns which we'll use and to represent we also saw that the current increase as the rate of change of magnetic flux inside the coil increase so decide et represents the change in the magnetic flux inside the coil now if we were to monitor the resistance of the whole circuit that is of the coil and the wires in the ammeter we would find that the current was inversely proportional to the total resistance of the circuit now this equation is usually written as i is equal to minus n over R decide ET and we'll talk about the significance of this minus sign in a future video on lenz's law so now if we multiply both sides of the equation by R we get R I equals minus and sie DT and resistance times the current is a voltage or a potential we call that the electro-motive force and so the electro-motive force is equal to minus n decide ET and this is known as Faraday's law.
Elektromanyetik indüksiyonu Michael Faraday'ın gerçekleştirdiği bir deney benzeriyle göstereceğim. Burada bir ampermetre ve üç bobinim var. Bir döngülü, on döngülü ve yüz döngülü bobinlere sahibim. Ayrıca bir çubuk mıknatısım var ve ilk olarak tek döngülü bobini ampermetreye bağlayarak başlayacağım. Şimdi tek döngülü bobin ampermetreye bağlı ve çubuk mıknatısı bobinin içine sokup çıkaracağım, çok yakından izlerseniz ampermetre ibresinde hafif bir sapma görebilirsiniz. Şimdi on döngülü bobini bağlayayım ve aynı şeyi yapacağım. Çubuk mıknatısı bobinin içine sokup çıkarıyorum, şimdi ibrede daha fazla hareket görebilirsiniz. Gerçekten çok yavaş hareket ettiğimde küçük bir sapma görüyorsunuz ve hızlı hareket ettiğimde daha büyük bir sapma görüyorsunuz. Ayrıca mıknatıs içeri girdiğinde ibre sağa sapar ve dışarı çıktığında sola sapar, ancak mıknatıs hareket etmediğinde akım olmadığını gösteren herhangi bir sapma olmaz. Dolayısıyla manyetik alan bobine girdiğinde pozitif akım akar, bobinden çıktığında ise negatif akım akar. Şimdi yüz döngülü bobini bağlayayım. Mıknatısı çok yavaş hareket ettirdiğimde sağa sapma görüyorsunuz, dışarı çıkardığımda ise sola sapma. Hızlı hareket ettiğimde ise çok daha büyük bir sapma görüyorsunuz. Yani manyetik alanın değişim hızı akımı etkiler. Gördük ki bobindeki dönüş sayısı arttıkça akım artar, dolayısıyla akım dönüş sayısına orantılıdır. Ayrıca manyetik akı değişiminin hızı arttıkça akımın da arttığını gördük. Şimdi eğer devrenin toplam direncini izleseydik, yani bobinin, tellerin ve ampermetrenin direncini, akımın devrenin toplam direncine ters orantılı olduğunu bulurduk. Bu denklem genellikle i = -n / R decide ET olarak yazılır ve bu eksi işaretinin Lenz yasası hakkında gelecekteki bir videoda anlamını tartışacağız. Dolayısıyla denklemin her iki tarafını R ile çarptığımızda R I = -n decide ET ve direnç ile akım bir gerilim veya potansiyel oluşturur, buna elektromotor kuvvet denir ve elektromotor kuvvet -n decide ET olarak eşitlenir ve bu Faraday'ın yasası olarak bilinir.
Can you give a theoretical proof by considering charges and force components on them at both pointed and blunt ends , I have been looking for one for a long time .
The electrostatic attractive force falls off as one over the distance squared. So the force of gravity overwhelms the electrostatic attraction once the water is far enough away.
But what do the particles do in a fluid.? You had to tap the board, so there is friction between particles and surface. What happens when this friction is removed by placing particles in solution. We then see 3 dimensions, and I suspect, a map of the coil arrangement. hmmmmmm
1) Although your hand cannot detect a difference, does it take more force to push the magnet through the 100 loop vs 1 loop ? 2) Do we understand, at the quantum level, why this electric force generation occurs ? 3) I noticed your meter bounced, which implies when removing the magnet, the field collapses into an AC current, which is not possible. You might mention why that meter is bouncing. Thanks. -- Some retired software guy. -- 5.22.24
1. Yes it would take more force. Moving the paddles by hand with the apparatus in this video I can feel the force ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-MglUIiBy2lQ.htmlfeature=shared 2. It is a fundamental observation of nature. No different than trying to find a deeper explanation of why do two like charges repel. 3. That is probably a mechanical reaction of the meter.
"Electromagnetic Fields and Waves" by Lorrain & Corson (3rd Edition) covers dielectrics in Chapters 9 & 10 including some enlightening diagrams elaborating on E & D fields and bound & free charge. The problems are interesting as well. I used the 2nd Edition back in the day. Nice presentation!
