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NEET-XII-Physics

26: Laws of Thermodynamics

with Solutions - page 2
Qstn# ii-5 Prvs-QstnNext-Qstn
  • #5
    Consider the process on a system shown in figure. During the process, the work done by the system
    (a) continuously increases
    (b) continuously decreases
    (c) first increases then decreases
    (d) first decreases then increases.
    Figure
    digAnsr:   a
    Ans :
    (a) continuously increases
    Work done by a system,     `` W=\int PdV``
    Here,
    P = Pressure on the system
    dV = change in volume.
    Since dV is positive, i.e. the volume is continuously increasing, work done by the system also continuously increases.
    Page No 61: