$A$ solenoid is at a potential difference of $60\, V$ and the current flowing through it is $15\, A$. The resistance of the coil will be ............ $\Omega$.

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

$I-V$ 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

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

For a wire,$\frac{R}{l} = \frac{1}{2} \, \Omega/cm$ and the length of the wire is $l = 5 \, cm$. If a potential difference of $1 \, V$ is applied across it,the current through the wire will be: $(R = \text{Resistance})$ (in $A$)

Ohm's law is true for which of the following?