Measurement and Measuring Instruments Important Questions

9th Standard

    Reg.No. :
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Science

Time : 02:00:00 Hrs
Total Marks : 50
    10 x 1 = 10
  1. Rulers, measuring tapes and metre scales are used to measure

    (a)

    Mass

    (b)

    Weight

    (c)

    Time

    (d)

    Length

  2. Which among the following is not a device to measure mass

    (a)

    Spring balance

    (b)

    Beam balance

    (c)

    Physical balance

    (d)

    Digital balance

  3. ___________is the derived quantity.

    (a)

    Length

    (b)

    Volume

    (c)

    Mass

    (d)

    Time

  4. Unit of time is_________.

    (a)

    km

    (b)

    mm

    (c)

    second

    (d)

    cm

  5. There are___________fundamental units in SI system of units.

    (a)

    7

    (b)

    4

    (c)

    6

    (d)

    5

  6. The unit of area is_________

    (a)

    m3

    (b)

    m

    (c)

    m2

    (d)

    \(\frac{m}{s}\)

  7. Light travels________m in one second.

    (a)

    5 x 103

    (b)

    5 x 108

    (c)

    3 x 108

    (d)

    8 x 103

  8. 1 quintal is equal to_______kg.

    (a)

    100

    (b)

    200

    (c)

    1000

    (d)

    10

  9. With the help of common beam balance we can measure mass accurately up to_________gm.

    (a)

    2 gms

    (b)

    5 gms

    (c)

    100 gms

    (d)

    20 gms

  10. _________is the unit distance used to measure astronomical objects outside the solar system.

    (a)

    Parsec

    (b)

    km

    (c)

    cm

    (d)

    litre

  11. 5 x 1 = 5
  12. Length, mass and time are called__________.

    ()

    Fundamental unit

  13. The smallest amount of time imaginable to us is a twinkling of eye is called_________.

    ()

    atomus

  14. JS-1 is the unit of__________.

    ()

    Power

  15. 1 metric tonne is equal to________kg.

    ()

    1000

  16. The diameter of spherical objects can be measured with___________.

    ()

    Vernier Caliper

  17. 5 x 2 = 10
  18. What is the full form of SI system?

  19. Convert : 104°F in to Celsius scale.

  20. Calculate the correct readings of the Vernier caliper L.C. 0.01 em Zero correction - Nil.

    S.No. M.S.R V.C Observed Reading = M.S.R + (V.C x L.C) Correct Reading
    1 3 4    
    2 3 7    
  21. In which part of the Vernier caliper is used to measure the internal diameter of a cylindrical pipe?

  22. Define length.

  23. 5 x 3 = 15
  24. Write the need of a standard unit

  25. How will you measure the least count of vernier caliper ?

  26. Copy and complete the table.

    Measurement Unit Symbol
    Length ---- ---
    -- Kilogram --
    -- -- S
  27. The mass of an object is 5 kg. What is its weight on the earth?

  28. The Main scale reading is 3.8 Vernier scale coincidence = 5th division. No zero error. Find the length of the iron cylinder.

  29. 2 x 5 = 10
  30. Explain a method to find the thickness of a hollow tea cup.

  31. Find the diameter of a thin wire using screw gauge.

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