1.

A 100 W electric bulb was switched on in a 2.5 m × 3 m × 3 m size thermally insulated room having a temperature of 20°C. The room temperature at the end of 24 hours will be. (Take ​density of air = 1.2 kg/m3 and cv of air = 0.717 kJ/kg.

A. 321 °C
B. 341 °C
C. 450 °C
D. 470 °C
Answer» E.


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