A P-T graph is shown for a cyclic process. Select correct stateme… - Vidyadip

MCQ

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
✓
During process $B C$ internal energy of system increases
D
During process $B C$ internal energy of the system decreases

✓

Answer

Correct option: C.

During process $B C$ internal energy of system increases

c
(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

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