# NEET Physics Thermodynamics Questions Solved

For one complete cycle of a thermodynamic process on a gas as shown in the P-V diagram, which of following is correct ?

(1) $\Delta {E}_{\mathrm{int}}=0,\text{\hspace{0.17em}}Q<0$

(2) $\Delta {E}_{\mathrm{int}}=0,\text{\hspace{0.17em}}Q>0$

(3) $\Delta \text{\hspace{0.17em}}{E}_{\mathrm{int}}>0,\text{\hspace{0.17em}}Q<0$

(4) $\Delta \text{\hspace{0.17em}}{E}_{\mathrm{int}}<0,\text{\hspace{0.17em}}Q>\text{​\hspace{0.17em}}0$

(1) $\Delta {E}_{\text{int}}=0$, 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.

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