Recent content by xAly

Sorry, I am still quite not following. How does one justify the fact that there is no current? Jbriggs mentioned the fact that the potential must be the same at all the nodes, but isn't a wire also a perfect conductor and so there wouldn't be a current through the horizontal wire at all?

I still don't see how I can ignore the lower half of the circuit. Surely the current will still split up at the first junction?

I get really confused with these types of problems. I don't know how to break down the circuit properly. I tried to go anticlockwise and ignored the ammeter and the voltmeter as circuit components, which gave me R1 and R2 in series while R3 and R5 (in series) are in parallel with R4 and R6 (also...

Let ##R## denote resistance of standard resistor and ##R_v## the resistance of the variable resistor. I know that ##I = \frac{V}{(R_v + R)}##. Now I also know that ##P = I^2 R_v##represents the power dissipated by the variable resistor and that I need to maximise ##P##. The problem I am having...