Concept:An ohmic conductor follows Ohm's law, so the current and voltage are directly proportional.
Explanation:For an ohmic conductor,
V=IR with constant resistance
R.
Thus, as
I increases,
V increases uniformly.
On a current-voltage graph, this produces a straight line that passes through the origin.
Any curved graph, or a line that does not pass through
(0,0), indicates non-ohmic behaviour.
So, identify the graph that is a straight line starting from the origin.
Answer:The ohmic conductor is represented by the straight-line graph passing through the origin.
