CBSE  /  Class 11  /  Physics  /  Units and Measurements

  • 1. 
    What is the dimensional formula of magnetic field?

  • MT-2A-1
  • MT-1A-2
  • M-1L-2TA-1
  • M-1LTA-2

  • 2. 
    Electron volt is a unit of

  • charge
  • potential difference
  • energy
  • magnetic force

  • 3. 
    The volume of a cube in m³ is equal to the surface area of the cube in m². The volume of the cube is

  • 64 m³
  • 216 m³
  • 512 m³
  • 196 m³

  • 4. 
    In SI system the fundamental units are

  • meter, kilogram, second, ampere, Kelvin, mole and candela
  • meter, kilogram, second, coulomb, Kelvin, mole and candela
  • meter, Newton, second, ampere, Kelvin, mole and candela
  • meter, kilogram, second, ampere, Kelvin, mole and lux

  • 5. 
    Which one of the following represents the correct dimensions of the coefficient of viscosity?

  • [ML-1T-2]
  • [MLT-1]
  • [ML-1T-1]
  • [ML-2T-2]

  • 6. 
    A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are the path of the particle makes with the x-axis an angle of

  • 300
  • 450
  • 600
  • 0

  • 7. 
    Resolution is

  • a measure of the bias in the instrument
  • None of these
  • the smallest amount of input signal change that the instrument can detect reliably
  • a measure of the systematic errors

  • 8. 
    Absolute error of the measurement is

  • the difference between the individual measurement and the true value of the quantity cubed.
  • the difference between the individual measurement and the true value of the quantity squared.
  • the difference between two individual measurements and their mean
  • the difference between the individual measurement and the true value of the quantity

  • 9. 
    Which of the following units denotes the dimensions [ML2/Q2], where Q represents the electric charge?

  • Wb/m²
  • Henry(H)
  • H/m²
  • Weber(Wb)

  • 10. 
    Light year is a unit of

  • time
  • distance
  • sunlight intensity
  • mass
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