Physics-Heat Engines
NEET Physics Heat Engines MCQ Question
Type: MCQ-numerical-Medium-Class 11
A heat engine absorbs 1000 J of heat from a hot reservoir and performs 400 J of work. What is the change in internal energy of the system?
A
600 J
B
400 J
C
1000 J
D
1400 J
Correct Answer
Option A
Detailed Explanation
According to the first law of thermodynamics, the change in internal energy (∆U) is given by ∆U = q + w. Here, q = 1000 J (heat absorbed) and w = -400 J (work done by the system), so ∆U = 1000 J - 400 J = 600 J.
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