10 - Science - 14. Physics - Measuring Instruments

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10 - Science - 14. Physics - Measuring Instruments - Quiz

Prepared By Mr. S. Ravikumar, B. T. Asst., GHS, Arangaldhurgam, Vellore District.   ; &nbs p; & www. Padasalai. Net


Questions and Answers
  • 1. 

    Screw gauge is an instrument to measure the dimensions of very small objects upto _____

    • A.

      0.1 cm.

    • B.

      0.01 cm.

    • C.

      0.1 mm.

    • D.

      0.01 mm.

    Correct Answer
    D. 0.01 mm.
    Explanation
    A screw gauge is a highly precise instrument used to measure the dimensions of very small objects. It consists of a screw mechanism that allows for extremely accurate measurements. The answer of 0.01 mm indicates that the screw gauge can measure objects with a precision of one hundredth of a millimeter. This level of accuracy is necessary when dealing with very small objects, such as microchips or microscopic organisms, where even the smallest variations in dimension can have significant effects.

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  • 2. 

    In a screw gauge zero of the head scale lies below the pitch scale axis, the zero error is ______

    • A.

      Positive

    • B.

      Negative

    • C.

      Nil

    Correct Answer
    A. Positive
    Explanation
    The given question is asking about the zero error in a screw gauge where the zero of the head scale lies below the pitch scale axis. In this case, the zero error is positive. This means that the actual measurement will be greater than the reading obtained from the instrument.

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  • 3. 

    Screw gauge is used to measure the diameter of ______

    • A.

      Crow bar

    • B.

      Thin wire

    • C.

      Cricket ball

    Correct Answer
    B. Thin wire
    Explanation
    A screw gauge is used to measure the diameter of a thin wire because it provides a more precise measurement than other measuring instruments. The screw gauge consists of a screw mechanism that moves a spindle towards or away from an anvil. By rotating the thimble, the spindle moves, allowing for accurate measurements of the wire's diameter. This is particularly useful for measuring thin wires, as their small size requires a high level of precision.

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  • 4. 

    One light year is equal to _______

    • A.

      365.25 x 24 x 60 x 60 x 3 x 108 m

    • B.

      1 x 24 x 60 x 60 x 3 x 108 m

    • C.

      360 x 24 x 60 x 60 x 3 x 108 m

    Correct Answer
    A. 365.25 x 24 x 60 x 60 x 3 x 108 m
  • 5. 

    One astronomical unit is the distance between the centre of the earth and _____________

    • A.

      Centre of the Moon

    • B.

      Centre of the Sun

    • C.

      Centre of the Mars

    Correct Answer
    B. Centre of the Sun
    Explanation
    One astronomical unit is the distance between the center of the earth and the center of the Sun. This unit is used to measure distances within our solar system. The center of the Moon and the center of Mars are not used as reference points for measuring astronomical units.

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  • Current Version
  • Mar 19, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 02, 2013
    Quiz Created by
    Padasalai10S
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