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11.Thermodynamics
easy
For one complete cycle of a thermodynamic process on a gas as shown in the $P-V$ diagram, Which of following is correct
A
$\Delta {E_{{\mathop{\rm int}} }} = 0,\,Q < O$
B
$\Delta {E_{{\mathop{\rm int}} }} = 0,\,Q > 0$
C
$\Delta \,{E_{{\mathop{\rm int}} }} > 0,\,Q < 0$
D
$\Delta \,{E_{{\mathop{\rm int}} }} < 0,\,Q > \,0$
Solution
(a) $\Delta {E_{{\rm{int}}}} = 0$,
for a complete cycle and for given cycle work done is negative,
so from first law of thermodynamics $Q$ will be negative i.e. $Q < 0$.
Standard 11
Physics
