Self running coil?

[gotoluc]

Hi everyone,

I made a new video to seek more answers for those who know the answers to all these things

Link to video: http://www.youtube.com/watch?v=obFj9x1u4lA

Please post your "educated" explanations as to why 2 coils of the same inductance behave in such a different way.

Thanks for your time

Luc

[forest]

One coil with core and one without core ?

[gravityblock]

Hi everyone,

I made a new video to seek more answers for those who know the answers to all these things

Link to video: http://www.youtube.com/watch?v=obFj9x1u4lA

Please post your "educated" explanations as to why 2 coils of the same inductance behave in such a different way.

Thanks for your time

Luc

My best "uneducated" guess, is it has to do with impedance.  Impedance is the combination of inductive reactance (X_L), capacitive reactance (X_C), and resistance (R).

The impedance curve does not reach zero at its minimum point. The vectors above and below resonance show that the phase shift of the circuit at these frequencies is less than 90 degrees because of the resistance.

GB

[forest]

gotoluc  posted once upon a time this video http://www.youtube.com/watch?v=t_3OkDvmp_Y&feature=related

[forest]

another tip : look at the scope shots , they seems not identical ,right ?

"I recognized that it was of tremendous advantage to break at the peak of the wave.  If I used just an ordinary break, it would make and break the current at low as well as high points of the wave.  Of this apparatus I had two forms; one in which I drove the break right from the shaft of the dynamo and the other in which I drove it with an isochronous motor.  Then, by a movement of these knobs (K K), I would make the adjustments so that the makes would occur exactly at the top of the wave.  That is a form of break which is embodied in hundreds of patents and used now extensively." Nikola Tesla
http://www.tfcbooks.com/tesla/nt_on_ac.htm#Section_4