If the resistance of a wire is $50\,\Omega$,the graph between $\log\ V$ and $\log\ I$ is........

The $V-i$ graph for a conductor at temperatures $T_1$ and $T_2$ are as shown in the figure. $(T_2 - T_1)$ is proportional to

$A$ potential difference of $10 \,V$ is applied across a conductor of $1000 \,\Omega$. The number of electrons flowing through the conductor in $300 \,s$ is ..........

For a metallic wire,the ratio $V/i$ ($V =$ the applied potential difference,$i =$ current flowing) is

$I-V$ characteristic of a copper wire of length $L$ and area of cross-section $A$ is shown in the figure. The slope of the curve becomes

The voltage $V$ and current $I$ graph for a conductor at two different temperatures $T_{1}$ and $T_{2}$ is shown in the figure. The relation between $T_{1}$ and $T_{2}$ is