IBPH Ep. 9 Electromagnetic Induction

[@sigalig]

very helpful video. one thing my teacher lacks to help with is conceptualization. he simply derives equations all day and it is so easy to get lost and not know what he is doing. your conceptual help is great. thanks

[@Rivka45]

wow that was great, I learned more through this video then I have this whole semester in physics class. Thanks!

[@dbrozek]

Nareszcie temat nabral sensu! Dziekuje za ogromna pomoc!

[@stalk8r]

Thank you very much, this is just what I needed for my test! I think that I have just learned more than what I learned during the last five physics lessons at school. Thank you.

[@erfan939]

Thankyou it was an excellent video with comprehensive and crystal clear explanation of the concept. I learnt the concept like never before

[@UnEarthedMafia]

thank you very very much! a great resource and i'll be sure to watch your other videos and recommend them to my peers!

[@suryanarayanan6496]

Amazing

[@nahinabedin1070]

In the section you are referring to,he's saying: "When the electromagnet is switched on or off, the current through IT changes briefly from zero to a steady value ...." HIs statement is about the current through the electromagnet and NOT the current in the second solenoid (the induced current) which is shown on the ammeter. Also see the section of the video between 2:15 - 2:20 which refers to the electromagnet.

[@abpccpba]

I like the information in your presentation all but the music and the constant change in volume of it. The graphics above the show is great when you present Faraday's law made the variables understandable. If the producer of the video has the time to tell me the motivation for putting music in the presentation. I am aware that music make us fell good. Now you are making us fell good about the video; what about the abstract content of the video say Faraday law. Your students not movie audience?

[@razz223]

Foarte bine explicat! Felicitari Horatiu!

[@sanjeevan0]

Very nice video

[@Luckmann]

Thanks, this actually clarified a lot of stuff for me.

[@dave9343]

Thank you for taking the time to produce this video. It was very well done. 1) Would the result be the same, in terms of the induced EMF, if the end of the magnet (North or South) was to pass over the OUTSIDE of the coil instead of INSIDE (i.e, as in the demonstration)? 2) How would I determine which end of the wire is positive & which is negative? 3) How would I determine the direction of current flow? Thanks very much for your reply.

[@ibphysicshelp]

1) No. The result would be different. The flux through the coil/solenoid refers to the area _enclosed_ by the loop. Therefore, if you move the magnet outside the coil you would have a significantly lower induced emf. 2) Lenz's rule 3) Lenz's rule I would actually swap your questions 2 and 3. First, once I know the direction of the (conventional) current from Lenz's rule it would be much easier to determine which end of the coil is + and which is -.

[@artymex]

The segment where you demonstrate the effect of flux onto the emf (starting at 8:25) is unfortunately not clear. May be you could try a closer look at the galvanometer (and use also the same you used at the beginning). Otherwise, your video is very instructive. Well done!

[@komfyrion]

Excellent and very helpful video!

[@omer8836]

VERY GOOD VIDEO!!!! but tell me Emf= N* change in magnetic flux/ time taken what is time taken... which time taken plz looking forward for ur reply!!!

[@potugadu5160]

Great video. Thanks.

[@arshadmundaragi5089]

thanks a lot............

[@NotYowBusiness]

Omg I love this... First time I've actually understood this topic :L

[@qqtpie]

youtube closed caption isn't great at math and science videos. Is there any chance you can upload a transcript?

[@M4v3RicK99]

Hey just wanted to know if you could please post some videos doing actual IB questions on the chapters you have taught! Thanks

[@Cyno7]

i'm finding it hard to hav an intuition about the 'rate of change of magnetic flux'. is it that; as a imaginary fluid, a conductor moving through it , effectively cutting it, disrupts its flow thereby causing a movement. and that due to the motor effect, a movement will induce a current

[@nahinabedin1070]

really helped! thanks!

[@elliot0712]

Thanks for sharing Dexter. How's the laboratory?

[@dgamma1]

amazing!

[@firash.7015]

How is this applied to produce electricity?

[@mny353]

thank you so so much

[@Mogy336]

Thanks for sharing

[@alisherman9448]

"Time to pack up and go home" haha... I have a terrible sense of humor.

[@jg6582]

If we can use Electricity to make Magnetism and Magnetism to make Electricity. Why can't we do the same with ordinary light bulbs?

[@RVP9Oranje]

Thankss

[@haroldwestrich3312]

Thank you for posting! Through no fault of yours - I can't find a video that shows the galvanometer reaction to a magnet passing across the front of a coil !!?!?!?! Which is INSANE considering that across the front of a coil is the way nearly every motor that ever existed is made! Frustrating. Have you ever seen a motor that runs by inserting a magnet

[@haroldwestrich3312]

at 5:50 you state what happens the wrong way (when switched on it jumps to a point then returns to zero..... then when switched off it jumps to a point then returns to zero) you stated that it jumps to a point and remains until it is shut off then returns to zero!! just letting you know.

[@ibphysicshelp]

+Harold Westrich hi there. What I meant in that section is that the current in the electromagnet (not the induced one!) goes from zero to a steady value when the battery is connected and drops from that value to zero when the battery is disconnected.

[@janell148]

Good video. Content is very helpful. The music on the other hand is extremely distracting.

[@luonganhnguyenhuu3940]

I'm from Vietnam, I was in 9th grade. Could you lend me my 9th grade curriculum in usa? thanks( sory, i write not well)

[@vahaerionn9916]

Theek thi

[@VvalocityV]

The isnt Hans Christian, the first photo ever made wasin 1826, so thats not him, this is though, denmark.dk/~/media/Denmark/Images/Meet%20the%20danes/Great%20Danes/HCOErsted290.jpg?w=290&h=390&as=1&la=en