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11th Standard Physics English Medium Free Online Test Volume 1 One Mark Questions with Answer Key 2020

11th Standard

    Reg.No. :
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Physics

Time : 00:25:00 Hrs
Total Marks : 25

    Answer all the questions

    10 x 1 = 10
  1. If the force is proportional to square of velocity, then the dimension of proportionality constant is

    (a)

    [MLT0]

    (b)

    [MLT-1]

    (c)

    [MLT-2T]

    (d)

    [MLT-1T0]

  2. If A = 2.331cm and C = 2.1cm, then A + C = ______________cm

    (a)

    4.4

    (b)

    4

    (c)

    4.43

    (d)

    4.431

  3. Which two of the following five physical parameters have the same dimensions?
    1.energy density
    2.refractive index
    3.dielectric constant
    4.Young's modulus
    5.magnetic field

    (a)

    1 and 4

    (b)

    1 and 5

    (c)

    2 and 4

    (d)

    3 and 5

  4. In equation of motion S = ut+\(1\over 2\)kt2 the dimensional formula for K is______________

    (a)

    [L T-1]

    (b)

    [L T-2]

    (c)

    [T]

    (d)

    [L-1 T]

  5. Number of significant digits in 3256______.

    (a)

    1

    (b)

    2

    (c)

    3

    (d)

    4

  6. If an object is thrown vertically up with the initial speed u from the ground, then the time taken by the object ' to return back to ground is

    (a)

    \(\frac{u^2}{2g}\)

    (b)

    \(\frac{u^2}{g}\)

    (c)

    \(\frac{u}{2g}\)

    (d)

    \(\frac{2u}{g}\)

  7. Choose the correct statement from the following

    (a)

    Centrifugal and centripetal forces are action reaction pairs

    (b)

    Centripetal forces is a natural force

    (c)

    Centrifugal force arises from gravitational force

    (d)

    Centripetal force acts towards the center and centrifugal force appears to act away from the center in a circular motion.

  8. Swimming is possible on account of

    (a)

    I law of motion

    (b)

    II law

    (c)

    III law

    (d)

    Newton's law of gravitation

  9. A wind-powered generator converts wind U(x) 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

  10. When a mass is rotating in a plane about a fixed point, its angular momentum is directed along,

    (a)

    a line perpendicular to the plane of rotation

    (b)

    the line making an angle of 450 to the plane of rotation

    (c)

    the radius

    (d)

    tangent to the path

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