oké, I'm ghaving a hard time with this one, bt it should be really simple acutally:(adsbygoogle = window.adsbygoogle || []).push({});

picture shows RLC circuit:

by kirchhoff law we can stat that:

+V-R*i(t)-(1/C)*integral(i*dt)-L*(di/dt)=0

I do understand V, R*i(t) and )-(1/C)*integral(i*dt), because those voltage physically are there with that polarity ( they have given energie by the work done by the source

However, the voltage across the coil, i don't get, L*(di/dt), this is the formula for deinducedvoltage by the coil itself, because i(t) is function of time and there fore by de law of Lenz must be in induced currect to oppose the increase of induction (given by di(t)).

So why they don't write down: Ecoil=E0-L*(di/dt), because the voltage E0 wich was already there has a different polarity than the induced voltage (induced voltage is producd by the coil...)

Am I totally confusing funamentalistic issues here ?

thank !

grtz

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# RLC circuit voltages

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