I'm a little confused.. When I write the equation of the circuit, do I have to keep the signs of the induced emf and self-inductance opposite?
I'll try to explain better my doubt: Consider a coil that has resistance R and inductance L. Running a current will give rise to both an induced emf and self-inductance, and the situation is:
induced emf= -k
self-inductance= $-L \frac{dI}{dt}$
Now, my question is: the equation of the circuit is given by:
$-k -L \frac{dI}{dt}=RI$
or by
$k -L \frac{dI}{dt}=RI$ ?