Mutual induction & inductance | Electromagnetic induction | Physics | Khan Academy

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3:00 - the direction of induced current on the red loop seems to be incorrect

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Hey man, why is M21 equal to M12?

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Daje dalla 5N del Fermi di Salò

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[@gurvir7284]

should the induced current be flipped?

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Cool stufff😍

[@manimohankrishnan]

Direction of current in coil has been marked in same direction sir

[@k2n3l]

As someone here asked in Hindi, will a smartphone, with wireless charging capability, get charged if we move a magnet close to it?

[@ippo_bhai]

I don't think so

[@potnuruleelarani9335]

I was wondering if the bulb glows or not if it's directly connected to the primary coil than the secondary coil

[@sarveshkerkar8681]

How is the current continuously changing in the primary coil?? as DC will be constant after some time and inductor blocks AC...

[@dalenassar9152]

If you look closely you will see that the power source is a transformer ie AC

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ALL wireless transmission involves some power transfer

[@rudra9017]

But sir, I have a doubt, if we have a dc source like a battery instead of the power plug, then will there be mutual inductance in this scenario ?

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my board exams start on 3rd dec 2021 and today is 28th nov :)

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Lovely! Thanks so much.

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Wow

[@prashantsingh7979]

Sir you told current is changing in coil 1 which leads to change in magnetic flux how is current changing in that coil????

[@thetruepicture1327]

We can use alternating currents to keep the current changing I Guess

[@josecarlosferreira4942]

Coil 1 is connected to an AC voltage source, therefore the magnetic flux is changing.

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Two ❌ Thoo✅

[@shiladhakal8940]

😊❤

[@chandrashekhar5961]

Plz make in hindi

[@istvanpapp8654]

u said M21 depends on the geo of th second coil also the other. so how can it be equals to each other while their geo is no equal? pls give me an exponation

[@kavi5990]

Mutual inductance is like a resultant of both these quantities For example if coil 1 has N turns and coil 2 has M turns The M21 will depend on product of the turns ie.. MN Hence it will be same

[@Farhan-sv1eh]

❤

[@sunilsebastian6762]

If u move the second coil the flux decrease ok.. But the rate of change of flux is same as that u move it towards the first coil.. So why the brightness of the bulb decrease?

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Eddy currents much k Like soundwave energy " air watts pressure wave propagation fields " have a sweet spot..

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[@danishnadeem568]

Thanks

[@rudra9017]

But sir, I have a doubt, if we have a dc source like a battery instead of the power plug, then will there be mutual inductance in this scenario ?

[@disteve9854]

yes

[@chamikaonyt]

Thanks