NEET2013Physics-Thermodynamics
NEET 2013 Physics First Law of Thermodynamics MCQ Question
Type: MCQ-numerical-Medium-Class 11
A system is taken from state a to state c by two paths adc and abc as shown in the figure. The internal energy at a is Uₐ = 10 J. Along the path adc the amount of heat absorbed δQ₁ = 50 J and the work obtained δW₁ = 20 J whereas along the path abc the heat absorbed δQ₂ = 36 J. The amount of work along the path abc is:
A
10 J
B
12 J
C
36 J
D
6 J
Correct Answer
Option B
Detailed Explanation
Using the first law of thermodynamics, ΔU = Q - W. For path abc, ΔU = Q₂ - W₂. Solving for W₂ gives 12 J.
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