What curve on the J vs E graph illustrated below represents

What curve on the J vs. E graph illustrated below represents Ohmic behavior?

Solution

voltage / current = a constant [called its resistance]

usually stated as R = V / I or I = V / R

If you are plotting a graph with I up the y-axis and V along the x-axis, this is an equation of the form

y = mx which is a straight line through the origin with a gradient m = 1/R

option C