Further Demonstrations of Electromagnetic Induction

At the following links,
• Electromagnetic Induct...
• Electromagnetic Induct...
are demonstrations of electromagnetic induction, which is the generation of an electric field by a changing magnetic field. In these two videos I was moving a magnet into, and out of, the center of a coil.
A viewer inquired as to what would happen if I moved the magnet laterally to, or along the outside of, the coil.
This video demonstrates, and explains, what happens.

[@haroldwestrich3312]

Thank you , THANK YOU so much for talking about a magnet passing ACROSS the coil and beside the coil. You would be surprised how few people ever demonstrate that and it's the way most electric motors are set up.

[@christinatucker6153]

Thank you for this video. I'm taking an online physical science class and this demonstration helped immensely!

[@howardhall2300]

Thank you very much, always wanted to see this demonstrated with a large coil.

[@abhijithanilkumar4959]

Thank you so much for uploading this, it was really helpful, .....cause I come from a country which is one of the most populated and least innovative, they teach everything in pure theoretical way and they don't want us to innovate and contribute to science and world ....People like you are the real scientists, thanks again...

[@aparnapandey7610]

Be proud of India. Please

[@abhijithanilkumar4959]

@@aparnapandey7610 I have to say the truth I love my motherland ofc That's why I feel sad seeing the terrible condition in education

[@syproful]

This is great to visualize this.

[@heyroldjuniorcambry1991]

Fantastic video !

[@dave9343]

Michael, Thank you so much for taking the time to make this new video, in response to my question. It must have taken quite a while to get that that many turns on that Bobbin. You have got the geometry/construction of the coil perfect. And your demonstration has also answerd two other questions that I did not ask; thanks much. However, in the last part of the video, starting right around 5:13 of the 5:38 seconds, where you start to move the magnet alongside the coil; if you were to use one pole of the magnet (anyone), then you would have answered my question exactly; You had the magnet horizontal to the side of the coil, my question is if the magnet was held perpendicular to the side of the coil and move from one end to the next.

[@electricandmagneticfields2314]

Richard, You are welcome. I already had the coil. You can see how I wound it in this video, kzbin.info/www/bejne/n4fFf3qAjZ1rncU The field emanating from the bar magnet spreads out in three-dimensions. So no matter how you orient the magnet to the coil, when you move the magnet there will be some flux change inside the coil. (Also the 30,000 turns of my coil are spread out because of the finite thickness of the wire so the coil is three-dimensional.) I just tried moving the magnet along the outside of the coil with it oriented perpendicular to what I was doing in the video. There was a current generated in the coil, but it was definitely less current.

[@surajshukla1787]

Really loved it

[@bestmankatsaka6150]

Thank you

[@dhananjayjoshi1040]

Excellent explanation sir , I have a doubt how many number turns required to charge my 3.7 V battery and what could be strength of the magnet ? Please help me.

[@kilner79]

hello thank you for the video i have a strange question that im strugling to find the answer for but is probably simple to you if i had a metal detector running at 12khz how would i emit more emf from the coil would i need more windings or more power or is it a fixed rate and depends how the coils overlap or teh size of the coils your input would be amazing thank you

[@jammerface2003aj]

Very well explained! I have tried this demonstration with the exact galvanometer. It is working but the needle is not deflecting much. i am wondering if the problem is the magnet that I'm using, a ceramic block magnet. Please answer ASAP. Thank you :)

[@electricandmagneticfields2314]

The stronger the magnet the larger the change in magnetic flux and the larger current you will generate. So get a rare earth magnet. Also the current will scale with the number of turns of the wire. So if you wind the wire 10 times as many turns you will get about 10 times the current.

[@jammerface2003aj]

Great video. I was wondering how you connected the coil to the galvanometer without connecting it to both ends, how is that done?

[@electricandmagneticfields2314]

The connections are on opposite sides of the large coil. The connection to the other end of the coil is probably hidden by the large coil in the video.

[@heyroldjuniorcambry1991]

Since we have generated a bigger current in the bigger coil with the same permanent magnet, I can assume that the magnetic field in the bigger coil is also stronger then the smaller coil using the same magnet right ?

[@electricandmagneticfields2314]

Yes because not only is the induced current larger, you also have more turns. The generated magnetic field will scale with both the current and number of turns.

[@heyroldjuniorcambry1991]

Fantastic ! Thank you Michael.

[@shubhamchaudhary8516]

Wooow

[@YouBazinga]

Do we get the same result, if the bar magnet is turned around and we move the south pole towards and away from the coil?

[@electricandmagneticfields2314]

except the direction of the current will switch.

[@shanxs5573]

Hey...Great video there....Just wanted to find out if a core must be used for the coil...I mean shud d copper wire be wound around a core..?..Thanx in advance..😁

[@electricandmagneticfields2314]

These all just have air as the core.

[@shanxs5573]

Michael Melloch , Cool...Tnx buddy.. 😁

[@bharathiravivarma7911]

Sir I have decided to implement the same technique to my upcoming project to produce electricity. My question is, how much output will I acquire if i use 20,000 turns of coil and use more powerful magnet (powerful than what you have used). And if i am to validate the amount of electricity produced, which device would be best to measure.

[@electricandmagneticfields2314]

you could put the output across a resistor and monitor the voltage across, or current through, this load to figure out how much power you are generating.

[@bharathiravivarma7911]

Sir other doubt regarding this is, I tried employing circular magnets with considerable turns over the material. But i could not make and own no idea of where it went wrong. I used multimeter to check the output. I implore you to suggest a viable way to fetch output.

[@electricandmagneticfields2314]

Your problem is the multimeter.You need a meter that will be responsive to a pulse of current like a galvanometer. www.amazon.com/Electronix-Express-01GAL500UA-Galvanometer-500/dp/B015X6U2OO/ref=sr_1_1?s=automotive&ie=UTF8&qid=1476362756&sr=1-1&keywords=galvanometer

[@jayapavidranramachandran5058]

Michael Melloch sir will we get the output if v use ring magnets to move it laterally??

[@electricandmagneticfields2314]

Yes

[@williamstorey5024]

Does a stronger magnet make a stronger change there for a stronger voltage?

[@electricandmagneticfields2314]

Yes

[@kapildev4222]

i have doubt if increase the number of turns of the coil what will happens to the voltage ? does it increases or decreases?

[@electricandmagneticfields2314]

The voltage will scale with the number of turns. You double the number of turns you double the voltage you are producing.

[@kapildev4222]

Thank you bro for your valuable reply

[@arkhamknight055]

What happens if the magnet is kept stationary within the coil ?

[@electricandmagneticfields2314]

No current is generated. To generate a current there has to be a changing magnetic flux inside the coil.

[@kapildev4222]

I have another doubt if increase the thickness of wire of the coil, the voltage & current produces in it ?

[@electricandmagneticfields2314]

There will be some voltage drop in the wire. So a thicker wire will have a lower resistance and more of your voltage will appear across the load. However, the currents are low so there probably is no reason to be concerned about the voltage dropped in the wire.

[@kapildev4222]

if increase the thickness of wire of coil ,does the amp rate increases ?

[@electricandmagneticfields2314]

Slightly due to the slightly lower resistance with a thicker wire.

[@marianaeugenio123]

Não entendi nada que você falou por que não sou boa no inglês, mas adorei o experimento! Muito obrigada!

[@electricandmagneticfields2314]

Fico feliz que você tenha gostado do experimento e eu tive que usar o Google tradutor!

[@marianaeugenio123]

@@electricandmagneticfields2314 Oww! Thank You! I do My fisic test today, and was so easy! Ty again!

[@shanxs5573]

May I knw which magnet u r using sir?

[@electricandmagneticfields2314]

It is just a generic bar magnet. It is not a rare earth magnet so not very strong.

[@acm-yo4mp]

where can I get or buy 30000 turns copper coil?

[@electricandmagneticfields2314]

www.amazon.com/TEMCo-AWG-Copper-Magnet-Wire/dp/B00LV8YI76/ref=sr_1_3?dchild=1&keywords=magnet+wire+5+pounds&qid=1584761000&sr=8-3

[@priyaoberoi226]

sr how much thick the wire should be??????

[@electricandmagneticfields2314]

The thickness should not matter. For the 30,000 turn coil I used 19 AWG and for the other coils 26 AWG.

[@mamarautASL2011]

I have tried to recreate this experiment but I failed. I was wondering if you could help me out. My coils are made up of thicker copper coil but much less in length (about 2 feet, so 4 to 5 loops). Also my loops aren't overlapping like yours are (think this might one of the causes to my failed recreation), I have gaps (I have tried to tie them all down but since the wire is thicker its a little harder to bend). Also, my multimeter can only be set to mA not micro Amps (on DC). Could it be that I am getting a current but too small for my meter to read? OR is my magnet not strong enough? 1) Gaps in coil 2) Need a micro Amp reading feauture 3) Stronger magnet Please let me know what I am doing wrong. Thanks!

[@electricandmagneticfields2314]

A stronger magnet will give more current, but your main problem is the multimeter.You need a meter that will be responsive to a pulse of current like a galvanometer. www.amazon.com/Electronix-Express-01GAL500UA-Galvanometer-500/dp/B015X6U2OO/ref=sr_1_1?s=automotive&ie=UTF8&qid=1476362756&sr=1-1&keywords=galvanometer