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11th Standard English Medium Physics Subject Heat and Thermodynamics Book Back 1 Mark Questions with Solution Part - II

11th Standard

    Reg.No. :
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Physics

Time : 00:30:00 Hrs
Total Marks : 5

    Part I

    5 x 1 = 5
  1. The graph between volume and temperature in Charles’ law is

    (a)

    an ellipse

    (b)

    a circle

    (c)

    a straight line

    (d)

    a parabola

  2. An ideal gas passes from one equilibrium state (P1, V1, T1, N) to another equilibrium state (2P1, 3V1, T2, N). Then

    (a)

    T1 = T2

    (b)

    \({ T }_{ 1 }=\frac { { T }_{ 2 } }{ 6 } \)

    (c)

    T1 = 6T2

    (d)

    T1 = 3T2

  3. When food is cooked in a vessel by keeping the lid closed, after some time the steam pushes the lid outward. By considering the steam as a thermodynamic system, then in the cooking process

    (a)

    Q > 0, W > 0,

    (b)

    Q < 0, W > 0,

    (c)

    Q > 0, W < 0,

    (d)

    Q < 0, W < 0,

  4. A hot cup of coffee is kept on the table. After some time it attains a thermal equilibrium with the surroundings. By considering the air molecules in the room as a thermodynamic system, which of the following is true

    (a)

    ΔU > 0, Q = 0

    (b)

    ΔU > 0, W < 0

    (c)

    ΔU > 0, Q > 0

    (d)

    ΔU = 0, Q > 0

  5. The V-T diagram of an ideal gas which goes through a reversible cycle A→B→C→D is shown below. (Processes D→A and B→C are adiabatic)

    The corresponding PV diagram for the process is (all figures are schematic)

    (a)

    (b)

    (c)

    (d)

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