Copper and Silicon are cooled from $300 \mathrm{K}$ to $60 \mathrm{K}$. The specific resistance

The temperature coefficient of resistance of a wire is $0.00125$ per degree Celsius. At $300 \mathrm{K}$ its resistance is $1 \mathrm{ohm}$. The resistance of the wire will be $2 \mathrm{ohm}$ at a temperature:-

The current-voltage graph for a given metallic conductor at two different temperatures $T_1$ and $T_2$ are shown in the figure. Then:-

Some electric bulbs are connected in series across a $220 \mathrm{V}$supply in a room. If one bulb is fused, then remaining bulbs are connected again in series across the same supply. The illumination in the room will: