Question

Which of the following graph represents the ohmic conductor?

Answer 1

Hint: For a particular conductor the value of its resistance is always constant so as we vary the voltage only current is changing its value according to voltage not the resistance of the ohmic conductor and use Ohm’s law in this question so use these concepts to reach the solution of the question.is the required answer.

Complete Step-by-Step solution:

As we know that according to Ohm’s law current (I) through the conductor between two points is directly proportional to the voltage (V).
$ \Rightarrow I \propto V$
Now the proportionality constant is (1/R) which is nothing but the conductance of the material (as R is the resistance of the material).
$ \Rightarrow I = \dfrac{1}{R}V$
So as we vary the voltage, current is also changed according to voltage directly (as the resistance of the conductor remains the same) as shown in the above figure.
So in an ohmic conductor voltage is directly proportional to current.
So this is the required answer.
Hence option (C) is the correct answer.

Note – Whenever we face such types of questions always recall the statement of Ohm’s law which is stated above so as we vary the voltage, current also varies according to the voltage directly so the graph between V and I should be linear.