A centre amount of gas is taken through a cyclic process ( A B C D A ) that has two isobars, one isochoric and one isothermal. The cycle can be represented on a p - V indicator diagram as the

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Solution

$P - V$ diagram for process $A B C D A$ :-
Process choric
$A B :$ Isochoric $(V = c o n s t a n t)$
$B C :$ Isibaric expansion. $(P = c o n s t)$
$C D :$ Isothermas expansion $(P V = c o n s)$
$D A :$ Isotaric compression. $(P = c o n s t)$

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