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Class 9 Physics · Chapter 1 · Test 2

Errors and Significant Figures

25 MCQs • Practice measuring instruments, least count, zero error, volume measurement, types of errors, precision, accuracy, and significant figures strictly from the provided chapter text.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

  1. Question 1

    Which instrument is most suitable for measuring the thickness of a few sheets of cardboard?

    • AMetre rule
    • BMeasuring tape
    • CMeasuring cylinder
    • DMicrometer screw gauge
    Show answer

    Answer: D

    The micrometer screw gauge is suitable for measuring very small thicknesses.

  2. Question 2

    What is the least count of a metre rule described in the chapter?

    • A1 cm
    • B1 mm
    • C0.1 mm
    • D0.01 mm
    Show answer

    Answer: B

    The least count of a metre rule is 1 mm.

  3. Question 3

    One main scale division is 1 mm and ten Vernier divisions equal 9 mm. What is the least count?

    • A1 mm
    • B0.9 mm
    • C0.1 mm
    • D0.01 mm
    Show answer

    Answer: C

    The least count is 1 mm minus 0.9 mm which equals 0.1 mm.

  4. Question 4

    How is a measurement calculated using Vernier callipers?

    • AMain scale reading minus Vernier reading
    • BMain scale reading plus least count multiplied by Vernier reading
    • CVernier reading divided by least count
    • DMain scale reading multiplied by Vernier reading
    Show answer

    Answer: B

    The reading is the main scale reading plus the least count multiplied by the Vernier scale reading.

  5. Question 5

    When the Vernier zero is to the right of the main scale zero with the jaws closed what zero error is present?

    • ANegative zero error
    • BPositive zero error
    • CRandom error
    • DNo zero error
    Show answer

    Answer: B

    The Vernier zero to the right of the main scale zero indicates positive zero error.

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