# Find total resistance using LTspice

How can I calculate the total resistance of resistors combination between points a and b ?

I have already designed the circuit and added a 1 A current source between a and b. For dependent current source I used component g (voltage dependent current source).

Solving node equations I was able to find Rab using Ohm's law . According to my calculations V1 = 1.8282... V and V2 = 5.4545... V .

Rab = Vab / 1 = Vx

My question is how can I find voltage Vab = Vx ?

• For your circuit with a 1A current source, the Vx voltage is equal to 5.4545..V – G36 Oct 31 '20 at 21:45
• Your inputs for the VCCS are reversed. – a concerned citizen Oct 31 '20 at 22:13
• @aconcernedcitizen Thank you very much, that solved the problem . – estamos Nov 1 '20 at 9:01

Your b node is connected to ground so its voltage (as reported by SPICE) is always 0.
Therefore what you call $$\V_{ab}\$$ is what SPICE calls V(a), which is reported in the screen image you provided.