How Does Wireless Charging Work?

This science and technology video explains how wireless charging works. Energy is transferred from the charger to the phone by means of two coils of wire that must be in close proximity to each other. AC current is needed for energy transfer to occur. A constant current source won't make the cut. The current has to change constantly for energy to be transferred into the second circuit.

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Magnetism - Review:

Faraday's Law of Electromagnetic Induction:

Lenz's Law - Induced Current:

Induced EMF In Moving Conductor:

Electric Generators & Induced EMF:

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Counter EMF of DC Motors:

Transformers - Physics Problems:

Mutual Inductance & Solenoids:

Self-Inductance of Inductors & Coils:

How To Make an Electromagnet:

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Faraday's & Lenz's Law of Electromagnetic Induction:

Energy Stored In an Inductor:

RL Circuits - Inductors & Resistors:

Final Exams and Video Playlists:

Full-Length Videos and Worksheets:

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[felixcat]

Something is bothering me. How do you power up a solenoid? Can you think of it as how you described this circuit or can a solenoid work using both AC and DC?

[JzeroN]

we did this in my Elec. Machines & Transformers class. but instead of an led we just measured the output voltage and phase angles with different number of turns and coil direction.

[innocentntuli]

Hello Sir i was wondering if it was possible to have wireless charging using the principle of how a phone connects to a WiFi that possible and if so does would it obey the laws of Physics

[sanjurotsubaki]

It's not a motor, it's a f-in jet engine.

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On this note can we have one for wireless earphones too please ?

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