Q.

Figure  shows  variation  of  internal  energy  U  with the  density  ρ  of  one  mole  of  ideal mono – atomic  gas  for  a  thermodynamic cycle  ABCA. Here process AB is a part of rectangular hyperbola.Incorrect diagram for the above process among the following is

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a

b

c

d

answer is 2.

(Detailed Solution Below)

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Detailed Solution

Process C to A is isothermal process, with increasing volume and decreasing pressure.Process  A to B is isobaric process, with decreasing volume.Process  B to C is isochoric process , with increasing temperature.
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