In a cyclic process shown in the figure an ideal
gas is adiabatically taken firm B to A, the work done on the gas during the process B ⟶ A is 30 J, when the gas is taken from A → B the
heat absorbed by the gas is 20 J. The change in internal energy of the gas in
the process A ⟶ B is
![](https://s3-us-west-2.amazonaws.com/tnl-content-images/moodle-migration/35427_752d73f3e9e6a88d2c83750338c709abeb4fc6be_1.PNG)