Plot a graph showing variation of current versus voltage for the material $Ga$.

Hint
Gallium is the material, which looks like soft silver metal which is mainly used in electronic circuits, semiconductors and LED’s. It is also used in high temperature thermometers, barometers. By ohm's law, the current versus voltage graph for Gallium is drawn.
The ohm's law is given by,
$\Rightarrow V = IR$
Where, $V$ is the voltage in the material, $I$ is the current in the material and $R$ is the resistance of the material .

Complete step by step answer
The ohm's law states that the voltage in any circuit is directly proportional to the current in the circuit when the resistance is constant in the circuit. The voltage in the circuit is positive then the current is also positive and the voltage is negative then the current is also negative. If the voltage is equal to the zero, then the current is also zero.

From the above graph, if the system is forward biased, then the current of the material gallium and the voltage of the material Gallium is positive. If the system is reverse biased, then the current of the material Gallium and the voltage of the material gallium is negative. There is no cross sign of the voltage of the material gallium and the current of the material gallium. Cross sign means, if the voltage is positive, the current is negative. That type of characteristics is not in the material Gallium.

Note
If the system is forward biased, then the current of the system is forward current and the voltage of the system is the forward voltage. If the system is reversed biased, then the current of the system is reverse current and the voltage of the system is the reverse voltage.