Physics-
General
Easy
Question
The p-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from 
is 30 J, and 40 J heat is given to the system. The change in internal energy between A and C is
- 10 J
- 70 J
- 84 J
- 134 J
The correct answer is: 10 J
Since, work is done by the system, so it is positive. Therefore,
Heat given to the system,
According to first law of thermodynamics, change in internal energy is given by
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