An ideal gas is taken reversibly around the cycle $a-b-c-d-a$ as shown on the temperature $T$ - entropy $S$ diagram. The most appropriate representation of above cycle on a internal energy $U$ - volume $V$ diagram is
KVPY 2016, Medium
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(a) In given cycle
$b c$ and $a d$ are isothermal processes $(T$ and $U$ are constants). $a b$ and $c d$ are isentropic processes ( $S=$ constant).
So, plot of above cycle on $U-V$ diagram is
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