coil help

[yasir_ali]

@ indulis

with Air core, we have very small inductance but adding a core increases the Inductance and i think the coil must have 50 turns,so increases Inductance and the length of the coil is 6cm, i just measured. is it still less? or the inductance is less according to the voltage i applied?

 

[indulis]

Once the nail saturates, it done... theres no more core and it's just a short.

How much inductance you need depends on what flux level the nail saturates. Remember, you are increasing the inductance to reduce the current there by reducing the flux in the nail.

 

[yasir_ali]

ok. i just got it indulis. it depends on the core. and i think every core is somewhat fix to a level of flux, when reach to this level it saturates and becomes a short.if it is true, then we can say that it depend upon voltage apply, because flux generate depend upon the voltage we applies. am i correct?

 

[indulis]

It's current not voltage.

 

[yasir_ali]

oh! sorry! yes you are right. so can we say that the saturation of a core depend upon current we applied? because as we increase the current, the flux increases and i think every core is fix to somewhat a level of flux. when the level of flux increase this saturation level of the core, the core becomes a short. am i correct?

 

[indulis]

Yes, that is correct.

 

[yasir_ali]

Thanks indulis. Thanks a lot

 

[yasir_ali]

ok indulis. tell me how can i induce voltage in secondary? i think i'll have to decrease the current. am i right?