Simple circuit - problem

[mondo90]

Hello, I have simple circuit shown below, my question is how to find i0 and v0 plus why there are "+" and "-" signs next to 8 Ohm resistor ? Resistors doesn't have polarity, so what it means ?



Thanks for help.

 

[ALERTLINKS]

Polarity is of voltage Vo. You need to study Ohm's Law and about connecting resistors in parallel.

 

[mondo90]

Yes resistor in parallel is a good point here.
Thanks for tip

 

[albbg]

In the circuit you have an independent current source (the left-most), a current source that generate a current of ampliteude depending from the current flowing in the 2 ohm resistor and two resistors in parallel.
You need to apply Ohm's law, but also Kirchoff's law. The exercise is easy to solve.

 

[mondo90]

albbg, thanks for participation in this subject but it's already solved

 

[bzznxlad]

If you would like to exercise how to solve electrical circuits probably you will find here some useful examples. I used this examples during my studies and they were helpful.

http://www.mbstudent.com/electrical-engineering-branch-current-method.html

 

[Surendhar M]

The + and - symbol is to measure the volatge output. Which will give you the postive volatge level if you reverse the leads while measuring obviously it will give you a negative voltage. You should not connect any loads in a opposite direction.