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11.Thermodynamics
medium
A $P-T$ graph is shown for a cyclic process. Select correct statement regarding this
A
During process $C D$, work done by gas is negative
B
During process $A B$, work done by the gas is positive
C
During process $B C$ internal energy of system increases
D
During process $B C$ internal energy of the system decreases
Solution
(c)
In process $B C$ (isochoric process) where $\Delta T$ is (+)ive.
So $\Delta U=n C_v \Delta T$
$\because \Delta T$ is positive $\Rightarrow U$ increases
Standard 11
Physics
