I would really appreciate if someone could clear this up for me. Basically, with the first one (link below), we are told to set the source (Vs) to 6v and then measure the voltage across each resistor. It however says in the question to make sure the polarities of the measured quantities are correct. My issue is, because the arrows above the resistors are going in the opposite direction to the arrow for the supply, will the values of V1 and v2 be negative or still positive? http://www.flickr.com/photos/53512951@N06/8122890952/in/photostream Also, with another circuit, we are dealing with Thevenins Theorem and have been given a circuit containing a set of resistors and a 12v supply which has not yet been simplified. We are then told to put a load resistor (Rl) between A and B and measure both the voltage and current across the load resistor. We are told to do this for a number of different resistor values. Should the voltage across Rl be the same as the supply voltage for each of the different load resistors? it then says to remove the load resistor and measure the open circuit voltage across A - B. Should this also be the same as the supply voltage and the voltage seen across each of the load resistors which were placed between A and B? Cheers.