Question
Question: P-V diagram of cyclic process ABCA is as shown in figure. Choose the correct statement – 
A
DQA ® B = negative
B
DUB ® C = positive
C
DWCAB = negative
D
All of these
Answer
All of these
Explanation
Solution
A ® B, PV = const., P¯, V¯, T¯ So (DU) = –ve
B ® C, P = const., V µ T, V, T, (DU) = +ve
C ® B, C ® A, V = const., A ® B, V¯, (DW) = –ve
