# NEET Physics Thermodynamics Questions Solved

A thermally insulated rigid container contains an ideal gas heated by a filament of resistance 100 Ω through a current of 1A for 5 min . Then change in internal energy is -

(1) 0 kJ

(2) 10 kJ

(3) 20 kJ

(4) 30 kJ

(4) Volume of the ideal gas is constant so $W=P\Delta V=0$

$\Delta Q=\Delta U$$\Delta U={i}^{2}Rt$ $={1}^{2}×100×5×60$     {First law }

$=30×{10}^{3}=30KJ$

Difficulty Level:

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