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  4. Carnot cycle is plotted in P-V graph. Which portion represents an isothermal expansion?

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Q. Carnot cycle is plotted in $P-V$ graph. Which portion represents an isothermal expansion?Physics Question Image

Thermodynamics

Solution:

$A B$ is isothermal expansion.
$B C$ is adiabatic expansion
$C D$ is isothermal compression
$\Delta A=$ adiabatic compression.