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

11th Standard

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Physics

Time : 00:30:00 Hrs
Total Marks : 10

    Part I

    10 x 1 = 10
  1. Two objects are projected at angles 30° and 60° respectively with respect to the horizontal direction. The range of two objects are denoted as R30° and R30°. Choose the correct relation from the following

    (a)

    R30° = R6

    (b)

    R30° = 4R6

    (c)

    R30° =\(\frac{R_{60°}}{2}\)

    (d)

    R30° = 2R6

  2. Force acting on the particle moving with constant speed is

    (a)

    always zero

    (b)

    need not be zero

    (c)

    always non zero

    (d)

    cannot be concluded

  3. A wind-powered generator converts wind energy into electric energy. Assume that the generator converts a fixed fraction of the wind energy intercepted by its blades into electrical energy. For wind speed v, the electrical power output will be proportional to

    (a)

    v

    (b)

    v2

    (c)

    v3

    (d)

    v4

  4. Two discs of same moment of inertia rotating about their regular axis passing through center and perpendicular to the plane of the disc with angular velocities ω1 and ω1. They are brought in to contact face to face coinciding with the axis of rotation. The expression for loss of energy during this process is

    (a)

    \(\frac{1}{4}\)\(I(\omega _{1}-\omega _{2})^2\)

    (b)

    \(I(\omega _{ 1 }-\omega _{ 2 })^{ 2 }\)

    (c)

    \(\frac{1}{8}\)\(I(\omega _{1}-\omega _{2})^2\)

    (d)

    \(\frac{1}{2}I\)\((\omega _{1}-\omega _{2})^2\)

  5. The work done by the Sun’s gravitational force on the Earth is

    (a)

    always zero

    (b)

    always positive

    (c)

    can be positive or negative

    (d)

    always negative

  6. A certain number of spherical drops of a liquid of radius R coalesce to form a single drop of radius R and volume V. If T is the surface tension of the liquid, then

    (a)

    energy = 4 V T \(\left( \frac { 1 }{ r } -\frac { 1 }{ R } \right) \)is released

    (b)

    energy = 3 V T \(\left( \frac { 1 }{ r } +\frac { 1 }{ R } \right) \)is absorbed

    (c)

    energy = 3 V T \(\left( \frac { 1 }{ r } -\frac { 1 }{ R } \right) \)is released

    (d)

    energy is neither released nor absorbed

  7. In an isochoric process, we have

    (a)

    W = 0

    (b)

    Q = 0

    (c)

    ΔU = 0

    (d)

    ΔT = 0

  8. If sP and sV denote the specific heats of nitrogen gas per unit mass at constant pressure and constant volume respectively, then

    (a)

    sP - sV = 28R

    (b)

    sP - sV = R/28

    (c)

    sP - sV = R/14

    (d)

    sP - sV = R

  9. An ideal spring of spring constant k, is suspended from the ceiling of a room and a block of mass M is fastened to its lower end. If the block is released when the spring is un-stretched, then the maximum extension in the spring is

    (a)

    4\(\frac { Mg }{ k } \)

    (b)

    \(\frac { Mg }{ k } \)

    (c)

    2\(\frac { Mg }{ k } \)

    (d)

    \(\frac { Mg }{ 2k } \)

  10. Which of the following represents a wave

    (a)

    (x - vt)3

    (b)

    x(x+vt)

    (c)

    \(\frac{1}{x+vt}\)

    (d)

    sin(x+vt)

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