The temperature coefficient of resistance of a wire at $0^{\circ} \mathrm{C}$ is $0.00125^{\circ} \mathrm{C}^{-1}$. At $25^{\circ} \mathrm{C}$ its resistance is one ohm. The resistance of the wire will be $1.2 \mathrm{ohm}$ at

When temperature of the conductor is increased, then the collision frequency between current carries ( electrons ) and atoms increases. This results in

$10$ wires (same length, same area, same material) are connected in parallel and each has $1\Omega$ resistance, then the equivalent resistance will be

The voltage - current $(V-I)$ graph of a metallic conductor at two different temperature $T_{1}$ and $T_{2}$ is shown below. At which temperature is the resistance higher?

Six identical cells, each of emf of $6V$, are connected in parallel. The net emf across the battery is