$A$ conductor behaves as a superconductor:

Of the following graphs,the one that correctly represents the $I-V$ characteristics of an 'Ohmic device' is:

The variation of current $(i)$ passing through a conductor as the voltage $(V)$ applied across its ends is varied is shown in the adjoining diagram. If the resistance $(R)$ is determined at the points $A, B, C$ and $D$,we will find that

From the graph between current $I$ and voltage $V$ shown below,identify the portion corresponding to negative resistance.

$A$ circuit to verify $Ohm's$ law uses an ammeter and a voltmeter. How should they be connected to the resistor?

Which of the following graphs represents an ohmic resistor?