ධාරාවක් ගමං කරද්දි, සන්නායකය වටේ..

[AnuradhaRa]

අම්මෝ දැංනං බෑ..
පස්සෙ කතා කරමු මේ ගැන..

 

[sudathmadusanka]

RLC circuites gana ub igena gannawada..

 

[AnuradhaRa]

මේකට උත්තරයක් තවම නොලැබුණේය

 

[AnuradhaRa]

තවම උත්තරයක් නැත...

 

[imhotep]

තවම උත්තරයක් නැත...

You got it mixed up...
at t= 0 (as soon as the battery is connected) the rate of change of current di/dt is not zero and is finite. So there is a back emf in the inductor which is L*(di/dt) till the current reaches the maximum value (which is governed by the resistance in the circuit - if there is no resistor, there is an inherent resistance in the coil of the inductor - it is not zero - which limits the current)
Once the current reaches it's maximum di/dt=0 and the inductor no longer operates and there is no back emf.
It is di/dt that matters!

 

[AnuradhaRa]

You got it mixed up...
at t= 0 (as soon as the battery is connected) the rate of change of current di/dt is not zero and is finite. So there is a back emf in the inductor which is L*(di/dt) till the current reaches the maximum value (which is governed by the resistance in the circuit - if there is no resistor, there is an inherent resistance in the coil of the inductor - it is not zero - which limits the current)
Once the current reaches it's maximum di/dt=0 and the inductor no longer operates and there is no back emf.
It is di/dt that matters!

ඔබ තුමා එනකං තමා හිටියෙ
ඉන්ඩකො පොඩ්ඩක් තේරුම් ගන්නකං මේ ඉංගිරිස් ටික

 

[AnuradhaRa]

You got it mixed up...
at t= 0 (as soon as the battery is connected) the rate of change of current di/dt is not zero and is finite. So there is a back emf in the inductor which is L*(di/dt) till the current reaches the maximum value (which is governed by the resistance in the circuit - if there is no resistor, there is an inherent resistance in the coil of the inductor - it is not zero - which limits the current)
Once the current reaches it's maximum di/dt=0 and the inductor no longer operates and there is no back emf.
It is di/dt that matters!

ඔයා කියන්නෙ ස්විච් එක දාපු ගමං ඇතිවෙන ධාරා වෙනස බින්දුවක් නෙමේ කියල
and is finite කිව්වෙ

 

[imhotep]

ඔයා කියන්නෙ ස්විච් එක දාපු ගමං ඇතිවෙන ධාරා වෙනස බින්දුවක් නෙමේ කියල
and is finite කිව්වෙ

Yes... In fact you yourself stated in your original post!

 

[AnuradhaRa]

එතකොට මේ රතු පාටින් පෙන්නල තියෙන තැන තමා back emf එකක් ඇති වෙන්නෙ, එහෙමද?

 

[imhotep]

එතකොට මේ රතු පාටින් පෙන්නල තියෙන තැන තමා back emf එකක් ඇති වෙන්නෙ, එහෙමද?

View attachment 74382

Yes... and the back emf persists till the current ramps up. When the current remains steady, obviously di/dt=0 (there is to rate of change of current) and there is no back emf. When you switch off exactly the same happens in the reverse direction.

 

[AnuradhaRa]

Yes... and the back emf persists till the current ramps up. When the current remains steady, obviously di/dt=0 (there is to rate of change of current) and there is no back emf. When you switch off exactly the same happens in the reverse direction.

මටනං මේක තාම අවුල්.. මේ පොයින්ට් එක හරියටම පැහැදිලි කරල තියෙන සයිට්වල ලින්ක්ස් ටිකක් දාන්ඩකො..

 

[D_Mad]

අනුරාධගේ දාර[-බා]ව​

 

[visalbro]

`ඒත් මේ කොයිල් එකේ හටගන්න වි.චු ක්ෂේත්‍රය ටික ටික අඩු වෙනව. ´ එහෙම වෙන්නැ,dc - emf නියතයි
Ac-emf වාචල්‍යයි.

emf ekak hadenna ac wennama oni ne bn? @AnuradhaRa

 

[hichchiputha]

E kalet tibila prashna

 

[AnuradhaRa]

emf ekak hadenna ac wennama oni ne bn? @AnuradhaRa

ඔව්

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වැඩ්ඩෙක් ඉන්නවනං මේක පැහැදිලි කරල දෙන්ඩ
2015 දාපු ත්‍රෙඩ් එකක්
තාම හොඳ පැහැදිලි කිරීමක් කෙරුවෙ නෑ කවුරුත්
------ Post added on Mar 31, 2021 at 12:39 PM