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(C) In a $P-V$ diagram,the work done is equal to the area under the curve.An isobaric process is one where the pressure remains constant.In the given

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$400$

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(C) In a $P-V$ diagram,the work done is equal to the area under the curve.An isobaric process is one where the pressure remains constant.In the given figure,the process $AB$ represents an isobaric expansion because the pressure is constant at $P = 2 	imes 10^2 \, N/m^2$ while the volume increases from $V_1 = 1 \, m^3$ to $V_2 = 3 \, m^3$.The work done during an isobaric process is given by $W = P \Delta V$.Here,$P = 2 	imes 10^2 \, N/m^2$ and $\Delta V = V_2 - V_1 = 3 - 1 = 2 \, m^3$.Therefore,$W = (2 	imes 10^2) 	imes 2 = 400 \, J$.

$A$ cyclic process is shown in the figure. The work done during the isobaric expansion is ...... $J$.

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