Measurement Book Back Questions

8th Standard

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Science

Time : 00:45:00 Hrs
Total Marks : 30
    3 x 1 = 3
  1. SI unit of temperature is __________

    (a)

    celsius

    (b)

    fahrenheit

    (c)

    kelvin

    (d)

    ampere

  2. SI unit stands for

    (a)

    International system of units

    (b)

    Integrated System of units

    (c)

    International symbol of units

    (d)

    Integrated symbol of units

  3. Quantities other than base quantities are called as

    (a)

    supplementary quantities

    (b)

    derived quantities

    (c)

    professional quantities

    (d)

    energy quantities

  4. 3 x 1 = 3
  5. One mole of a substance contains _______ atoms or molecules.

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    6.023 × 10+23

  6. The uncertainty in measurement is called as _______.

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    Errors

  7. The intersection of two straight lines gives us_______.

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    Plane angle

  8. 4 x 1 = 4
  9. Intensity of light coming from a candle is approximately equal to one ‘candela’.

    (a) True
    (b) False
  10. Angle formed at the top of a cone is an example for ‘Plane Angle’.

    (a) True
    (b) False
  11. Quartz clocks are used in GPS Devices.

    (a) True
    (b) False
  12. Candela is used to express electric field intensity.

    (a) True
    (b) False
  13. 3 x 2 = 6
  14. Convert 60° into radian.

  15. Convert \(\frac { \pi }{ 4 } \) into degree.

  16. Round off the number 1.864 to two decimal places.

  17. 3 x 3 = 9
  18. Define - ampere.

  19. What is electric current?

  20. What do you mean by luminous Intensity?

  21. 1 x 5 = 5
  22. List out the base quantities with their units.

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