An ideal gas undergoes cyclic process as shown in density pressure graph. During the process AB the work done |W

Q: An ideal gas undergoes cyclic process as shown in density pressure graph. During the process $AB$ the work done $|W_{AB}| = 70\,J$ . During the process $BC$, the gas absorbs $150\,J$ of heat. During the process $CA$ , gas undergoes expansion and does $210\,J$ of work

b $Q$ $\Delta U$ $W$ $AB$ $-70$ $0$ $-70$ $BC$ $150$ $150$ $0$ $CA$ $60$ $-150$ $210$ $\eta=\frac{140}{210} \times 100 \%=60 \%$

SECTION - A [PHYSICS - MCQ]

GSEB - English Medium

An ideal gas undergoes cyclic process as shown in density pressure graph. During the process $AB$ the work done $|W_{AB}| = 70\,J$ . During the process $BC$, the gas absorbs $150\,J$ of heat. During the process $CA$ , gas undergoes expansion and does $210\,J$ of work

AThe efficiency of cyclic process is $33\%$
BThe efficiency of cyclic process is $66\%$
CThe process $CA$ is adiabatic
DThe process $BC$ is isothermal

Diffcult

STD 11 Science
NEET
STD 11 - 11. thermodynamics
Physics

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	$Q$	$\Delta U$	$W$
$AB$	$-70$	$0$	$-70$
$BC$	$150$	$150$	$0$
$CA$	$60$	$-150$	$210$

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