How Does a Linear Current vs Voltage Graph Illustrate Ohm's Law?

[Karma]

I had to draw a Current vs Voltage graph, and they were both proportional and linear.
i just need help with these questions : what mathematical relationshop (proportionally) does the graph demonstrate between voltage and current?

What do the slopes represent?

pretty easy questions.

 

[joselck]

V=IxR (ohms law) If you graph I vs V the slope is 1/Resistance

 

[TsunamiJoe]

i know what your talking about, but i can't remember exactly how it goes, but your talking about the 3-d graphs correct?

 

[leright]

the relationship between voltage and current is V = IR, where R is resistance. So R is the proportionality constant. Now, divide by R on both sides to get V/R = I. Now, 1/R if the proportionality constant. 1/R is also known as conductance and is represented by the letter G.

Keep in mind that voltage and and current are only linearly related within a certain voltage range, where this voltage range depends on the circuit element in question. Then weird more complicated relationships occur. The power rating of an element describes this voltage/current range.