# kirchhoff's law

1. ### KCL or KVL problem.

I tried KCL but I couldn't get the right value. When I use KCL should I accept the branchs that dependent current source in it current i0 or something else. I tried to accept it i0 but couldn't get the right value if I shouldn't what is the current in that branch
2. ### Calculate the voltage V4 and current i6 of the circuit in the figure using only Kirchhoff and law of nodes and meshes

I tried to solve the equations I got but when I make substitutions I get to a deadlock where I can't substitute anything anymore. The equations I obtained are: i2=i1+i2 i3=i4+i5 i5=i7-i6 i2=i4+i6 3i2-i1R1-i5R2=0 2v-i2R3=0 -i6R4+2v-i5R2=0 Could someone help me understand step by step what...
3. ### How to calculate resistance in the R-circuit ?

In this simple R-circuit the voltage v = 24 volts, now I want to calculate R; for which I have tested multiple methods like KVL in all four meshes but I got stuck in KCL since direction of currents are not very clear. Thanks for your help in advance. Regards Sana Allah Kheiri
4. ### PN junction seems to violate Kirchhoff law? Where am I wrong?

Hi everyone, I am studying the PN junction and I have learnt that in open circuit condition it has a built-in voltage (here called B) determined by the difference in fermi level of its n-doped and p-doped parts. Then we can apply, for example, a forward bias, this will lower the voltage...