Quick Physics: induction coil explained

[@Greg_Chase]

On a physics test for a mainly electrically engineering student body, the following question was presented: *_"A transformer primary winding is powered by a DC voltage - select one of the following:"_* A) that won't work, transformers require an alternating (AC) voltage supplied to the primary winding to function B) I may have one in my car Very few students chose B), which is the correct answer. .

[@briant1550]

Thank you this was exactly what i needed.

[@rweerakkody4565]

Thank you very much sir for the simple and concise explanation! Now I understand how early spark gap transmitters worked.

[@daveb7999]

You make it sound easy, thanks for that. Subscribed!

[@ashutoshpatel9304]

Really nice video sir

[@HikeThePlanets]

That was a great demo, thanks much!

[@pgalaxy]

thank you. using a magnet as the core of the inductor should generate constant flux? the static interaction of magnets with metals generate constant flux. the magnetic attraction IS flux. correct me if I am wrong

[@chriswall7068]

Thanks explains induction and em wavees simply

[@KristineAFOAKWA]

Thanks sir for the clarification

[@khanyusuf09]

great video sir..thanks for sharing..

[@KisemboPhysicsAndMath]

Wow, you also demonstrated Corona discharge of sorts. Great video

[@ashitbarank]

Good explanation sir. Thank you so much.

[@vincentzulu7066]

Thank you very much.. but what happens when you put your fingers between the two metal electrodes??

[@JosephAndeka]

Very useful. my students liked it

[@andrewrobertson444]

Fantastic explanation! Thank you very much.

[@PhysicsHigh]

Glad you enjoyed it!

[@ΓιωργοςΡακοπουλος-δ2ο]

very good lesson with details explained

[@gastjjs]

is the output power proportional on both sides? primary and secondary?

[@chonneokipgen8893]

Thank u sir Pliz show us more video about induction coil

[@vishalparmar3707]

Amazing sir

[@arunkumark.r8895]

Nice video Whether this experiment can be used for detecting energy in the space

[@andrewrobertson444]

Well, as he said in the video, this circuit is a very simple radio wave generator. Disconnect the power supply and replace it with a detector and you've got a radio wave receiver. And that's a very elemental example of a radio telescope.

[@vinayakmannur6820]

Loved it..thanks

[@ted_van_loon]

So how does the tabber/tapper work, does it work like a sparkgab, which needs a specific capacitance to jump over, or does it have something to to with something like selfinduction to get a higher voltage in order to jump the gab?

[@andrewrobertson444]

I'm 99.9% sure it's the spark gap explanation.

[@briant1550]

Quick question. The first coil has a “ground” at the negative terminal of your dc power source. Does the 2nd coil have a ground? I feel like the changing magnetic field would be in the same direction everytime thus maybe one side of the 2nd coil would more or less be the side that consistently has less potential energy? Im thinking in terms of a car ignition system btw. Also in an ignition system there is usually a capacitor involved in this ignition coil aparatus. What role does it play? Thank you

[@andrewrobertson444]

The secondary coil doesn't need a ground partly because it's a closed loop and partly because it's alternating current. The current just goes backwards and forwards along the loop. As for car ignition, this is precisely how spark plugs work. The capacitors perform the function of the clicker.

[@salamaalqassabi8300]

The capacitor prevennts the spark from occuring at the contact area als in providing higher volt at the 2nd coil

[@floralawrence9927]

Helpful

[@vanessaderhie]

Thank you sir...a very simplified version and helpful too...I can't thank you enough🤗

[@arunfernandez1999]

this video was very useful thanks you so much that flex requirement was very important because no one tock about it I always wonder why induction primary coil doesn't get a short circuit, but now I know thank you very much 😍😍😍😘🤩

[@SoulSong892]

Will the output voltage be Alternating current or Direct current?

[@PhysicsHigh]

Direct current

[@SoulSong892]

@@PhysicsHigh Thanks. Ok I think now I understand, the DC incoming was switched on an off. Not really an alternating current. So output will be that sort of periodic DC (on and off)? or will it be straight DC? Or is the on/off current the same as normal DC. Thanks

[@newgenerationanpanman7870]

Thank you so much sir!

[@ZeroPointZap]

Plasma has ALL forms of light. Infrared. UV. Cosmic rays (photons, xrays and gamma rays) in a synergistic blend.

[@Traderhood]

So how does the induction coil works?

[@PhysicsHigh]

Really?

[@collinskiprop2667]

good one

[@emmettecox148]

How dangerous is this? How much current will you get if you touch one or both of the leads?

[@PhysicsHigh]

It’s not dangerous but the spark will hurt. It’s basically a transformer so although voltage is high, the current will be low. The amount will depend on input voltage as well the the load attached, in this case, your internal resistance.

[@salamaalqassabi8300]

Thanks sir

[@PhysicsHigh]

Welcome

[@baruk9706]

Is the amperage produced by the induction coil just as high?

[@PhysicsHigh]

No. Current is reduced. Since induction coil is a transformer, and increase in V results in a decrease in current to ensure power in equals power out.

[@mykulpierce]

The tapper is basically an adjustable spark gap correct?

[@ted_van_loon]

I've got a similar question

[@ted_van_loon]

perhaps it has something to do with the self indication since once you turn it on you get a current caused by the capacitor which is still empty.

[@mykulpierce]

@@ted_van_loon So I found an answer for this. The hammer / tapper is being activated by an electromagnet that it discharging with a capacitor. So if you can imagine as the dc current is fed, activates an electromagnet pulling the hammer/tapper in and completing the circuit and turning the electromagnet off. See Ruhmkorff coil breakdowns for the precise way this is broken down.

[@ted_van_loon]

@@mykulpierce okay so the magnetic field from the coil puls it open or there is a coil in front of the capacitor which activates when it is open because the capacitor which is reseted when closed then when open again accepts energy.

[@mykulpierce]

@@ted_van_loon essentially. And it's that pulsing electromagnet that induces the secondary coil! Pulsed DC being able to induce in the same way an AC coil would!

[@katelynmills7574]

Thank you!!!

[@PhysicsHigh]

You’re welcome

[@sureshsnmc]

I like it

[@collinskiprop2667]

it's good

[@roylarsen7417]

whekling coil !!

[@incredibleindia4605]

I was thinking he may touch the sparking.

[@PhysicsHigh]

I could but it hurts.

[@nilanadesilva1012]

First to like and first to comment!

[@ThePoshboy1]

Well, I guess I'm the 9th and 2nd.