# NEET Physics Thermodynamics Questions Solved

A system changes from the state (P1, V1) to (P2, V2) as shown in the figure. What is the work done by the system ?

(1) 7.5 × 105 joule

(2) 7.5 × 105 erg

(3) 12 × 105 joule

(4) 6 × 105 joule

(3) Work done = Area of PV graph (here trapezium)

$=\frac{1}{2}\left(1×{10}^{5}+5×{10}^{5}\right)×\left(5-1\right)=12×{10}^{5}J$

Difficulty Level:

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