An ideal gas is taken reversibly around the cycle a-b-c-d-a as shown on the T (temperature) – S (entrophy) diagram

The most appropriate representation of above cycle on a U (internal energy) – V (volume) diagrame is

Options

A.
B.
C.
D.

Answer

A

Explanation

bc `implies` Isothermal process
So. U remains constant
cd `implies` Isotropic process
So, S remains constant
bc should be straight line parallel to V
and cd graph should be