An ideal gas is filled in a closed rigid and thermally insulated container. A coil of $100 \Omega$ r

Question

An ideal gas is filled in a closed rigid and thermally insulated container. A coil of $100 \Omega$ resistor carrying current 1 A for 5 minutes supplies heat to the gas. The change in internal energy of the gas is

Professor PC Thomas Classes · Answer

$\Delta U = Q - W$. Rigid container $\Rightarrow W=0$. $Q = I^2Rt = 1^2 	imes 100 	imes 300 = 30000$ J $= 30$ kJ.