Very good and detailed explanation! I like the natural smiles also :)

This is the best explanation that I found so far. Thank you!

Danke für die Videos!

Great video! Never stop smiling ;)

An incredibly good explanation!

Nice Video Thank you for video

Very good - thanks for sharing!

This guy talks passionately

Hello, I have a question. Regarding the ferrite bead mentioned at the end, it's usually found in power cords. However, since power wires have both positive and negative polarities, wouldn't the current flow in two different directions on these two wires? In that case, how does the choke still work?

As an electronics technologist whose course material never covered this subject specifically, I always assumed that I would be able to figure this out if I sat down to think about it. I can now continue to make this assumption. 😁

As for as my experience with Switch mode power supply the filter inductance is very important for in rush current limiting cause if the inductance is to small more current will draw from the mains into the transformer and built up as heat wasting the current. And burning up the winding because if the core is rated for 6 amp and the chock is inductance is small 9 amp will drawn from the mains and 3 amps.is wasted as heat in the winding so the chock play many rolls in power supply

The problem is common mode noise current feeding in choke at the same time. Flux will build up in the loop. Possibly reached flux saturation region and then inductance will drop to zero. Is main inductance or leakage inductance to determine flux saturation point?

In your schematic shown at 2:34 min of this film, current entering Lcm will create opposite magnetic fields , what in effect they will cancel each other, so what is the reason for Lcm?

Are the chasis and power supply ground at different potential? If so then why?

Are emi filter inductor can help audio quality i mean speaker become quieter?