electrical resistance Definition and 6 Threads

Forget the mathematical derivations because the answer is wind (and you know it). It too has an exponential relationship with energy loss, and you can experience it yourself. It's not too hard to pedal a bike at 20km/h, much less easy at 30km/h, and almost impossible at 40km/h with respect to...

I'm working on the following differential resistance problem and wondering wether I'm approaching the question the right way. The problem is to find an expression for the resistance in the ##x##-direction of a wire with electrical resistivity ## ~ \rho ~ ## in terms of ##~ z_0 ~##, ##y_0 ~ ##...

From the graph: $$lnR(T)=\frac{-lnR(0)T^2_○}{T^2}+lnR(0)$$ I have assumed ##R(0)## to be the value of ##R## at ##1/T^2=0## and ##T_○## to be the value of ##T## at ##lnR(T)=0## From this I get, $$R(T)=e^{lnR(0)×\left(1-\frac{T_○^2}{T^2}\right)}$$ $$R(T)=R(0)^{\left(1-\frac{T_○^2}{T^2}\right)}$$...

I'm using a four-probe system (nextron) to measure the voltage between the two points of my sample. Sample has a cylindrical shape and it's placed on its base inside the instrument. The probes are placed on its upper surface (the base of the cylinder). From the voltage measured, I'd like to...

Ohm's law states that current is inversely proportional to resistance, but on the quantum level, why does that actually slow the current down for the whole circuit? In all of the basic explanations, it talks about how the more densely packed matter in the resistor creates more collisions and...

Hello dear forum members. I've run into some problem and I'm hoping someone here can give me a hint on how to solve it. There is an electrochemical method for separating some binary metal alloys based on the cementation phenomenon. I'll show you how it works with the example of separatting...