JEE PHYSICS MCQ: THERMODYNAMICS

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An electric heater supplies heat to a gaseous system at a rate of 100 W. If system performs work at a rate of 80 joules per second, then what is the rate at which internal energy increases?

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Correct option: B

20 J/s

Option B (20 J/s) is correct because it is the rate of internal energy increase calculated using the first law of thermodynamics.

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