Untitled.png For this circuit, in the ground point i can apply KCL??? I3, I2 and I1??? Why do i ask you this . I solved the second circuit, and if i consider Ie of transistor = Ie of resistor and i apply KVL for Ie*R+Veb=0 (i forgot to mark the loop) i dont obtain the same current as if i apply KVL for the marked loop . WHy??? Untitled.png BTW, im really sorry for not posting in the right section :|.