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  4. The pressure of a gas changes linearly with volume from A to B as shown in figure. If no heat is supplied to or extracted from the gas then change in the internal energy of the gas will be Is

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Q. The pressure of a gas changes linearly with volume from $A$ to $B$ as shown in figure. If no heat is supplied to or extracted from the gas then change in the internal energy of the gas will be IsPhysics Question Image

JEE MainJEE Main 2023Thermodynamics

Solution:

As $\Delta q =0$
$ \Delta u =- W $
$ W =\int PdV$
$ \Delta u =- W =30 \times 10^3 \times 150 \times 10^{-6}$
$ =4500 \times 10^{-3}$
$=4.5\, J $