Q. For one complete cycle of a thermodynamic process on a gas as shown in the $P$-$V$ diagram. Which of following is correct
A) $\mathrm{\Delta}E_{int} = 0,Q < 0$
B) $\mathrm{\Delta}E_{int} = 0,Q > 0$
C) $\mathrm{\Delta}E_{int} > 0,Q < 0$
D) $\mathrm{\Delta}E_{int} < 0,Q > 0$
Explanation
(a) $\mathrm{\Delta}E_{int} = 0$, for a complete cycle and for given cycle work done is negative, so from first law of thermodynamics $Q$ will be negative, $i.e.,Q < 0$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.