Hello,

I know this is a simple topic for most but i keep getting confused on assigning + and - values to resistors. can someone please explain to me how I know which side the + and - sign go on each resistor in the attached picture.

Thanks,

 

for resistances encountered by traversing in direction of current drop + at the entering side and - at the other.

 

I second that... well put~

 

After you have drawn all your voltage loops, go around the loop looking at each resistor and voltage source. If the current at a resistor is in the same direction as the voltage loop, it will be -IR. If they are in the opposite direction, it will be IR. For batteries, its the same thing except the direction of the current doesn't matter. If the voltage direction reaches to - terminal of the battery first, then it will be + EMF(voltage of the battery). If it reaches the + terminal first, then it will be -EMF.

 

Hello,

I know this is a simple topic for most but i keep getting confused on assigning + and - values to resistors. can someone please explain to me how I know which side the + and - sign go on each resistor in the attached picture.

Thanks,

Are you having problems because the current source and the voltage source are in the same loop?