- #1
Tiziano
Homework Statement
The following circuit is given.
I intend to calculate the current in every resistor (every quantity except i1, i2, i3, is known).
My textbook states that ℰ3-ℰ1 = (R1+R2+R3+R4+2r)*i, but I think it should be -ℰ3+ℰ1 on the left-hand side, since the current enters the negative and leaves the positive terminal of ℰ1 and does the opposite with ℰ3.
Homework Equations
Ohm's generalized law for a closed circuit (the algebric sum of the emf's equals R*i, where R is the total resistance)
The Attempt at a Solution
I've simply computed the same equation of the book, but I don't understand why my signs are wrong.