Axis question for electricity experiment question.

[Darth Frodo]

In an experiment to demonstarte relationship between current and p.d. in an electrilyte the book says to plot current on the Y axis. Why is this?

V = IR
R = V/I

I always assumed when you plot graphs, the slope must equal the constant.

Any input appreciated.

 

[gneill]

In an experiment to demonstarte relationship between current and p.d. in an electrilyte the book says to plot current on the Y axis. Why is this?

V = IR
R = V/I

I always assumed when you plot graphs, the slope must equal the constant.

Any input appreciated.

It's not an unbreakable rule, merely a convenience and convention. If it bothers you, consider that Conductance (G, in Siemens) is the reciprocal of Resistance (R, in Ohms). Thus I = V*G.