Both R and V are variables. There isn't anything special about V that gives it some special status over R. In any real cirucit, you can vary V AND R to affect the current, which is also a variable. Constants are things like the Universal Gravitation Constant, Avogrado's Number and Boltzmann Constant, as in the previously mentioned, PV=nRT. In the case of Ohm's law, the constant of proportionality is unity.
If R was a constant, they it wouldn't be included on the little triangle that noobs use to calculate these quantities. Do you ever see anyone calculating Boltzmann's constant from pressure and temperature?
Hi again,
That's funny, because i posted that "you have to know the variables
from the constants" and you go right ahead and try to say that a
constant is again a variable!
If you want to keep asserting this go right ahead, but why didnt you
then answer the question about whether A,B,C, and D are constants
or not?
So now lets see what you know about mathematical equations...
In the equation again:
y=A*x^3+B*x^2+C*x+D
are A,B,C, and D constants or variables?