# In hot wire Ammeter due to flowing of current temperature of wire is increased by $5^{\circ} C$. If value of current is doubled,then increases in temperature will be :
$\begin{array}{1 1} (1)\; 15^{\circ}C \\ (2)\; 20^{\circ}C \\ (3)\; 25^{\circ}C \\ (4)\; 30^{\circ} C \end{array}$