Practice MCQs For Measurement of Physical Quantities


This quiz contains practice questions for Measurement Of Physical Quantities (O Level). There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. What is the zero error as shown in the figure below?

Caliper reading v3
2. A workman measures, as accurately as possible, the length and internal diameter of a straight copper pipe.

The length is approximately 600 cm and the internal diameter is approximately 2 cm.

What is the best combination of instruments for the workman to use?
Internal DiameterLength
ARulerRuler
BRulerTape
CVernier CalipersRuler
DVernier CalipersTape
3. Which of the following correctly lists one scalar and one vector quantity?
Scalar QuantityVector Quantity
ADisplacementWork
BEnergyForce
CForceAcceleration
DVelocityMass
4. Which instrument is used to measure the internal diameter of a pipe with a single measurement?
5. Which of the following is accurate but not precise?

Accuracy-vs-Precision version 1
6. Which of the following groups of physical quantities consists only of scalars?
7. The diagram shows a vernier V placed against a scale S.

vernier qn 1What is the vernier reading?
8. The dimensions of a small book is measured as 32.2 mm, 54.2 mm, 13.7 mm. What measuring tool could have been used to obtain these readings?
9. In an experiment, a ball is rolled down a curved track that is about half a metre long.

slanted rampWhich measuring device should be used to measure the length accurately?

 
10. What is the zero error as shown in the figure below?

Micrometer reading v2

 

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38 thoughts on “Practice MCQs For Measurement of Physical Quantities”

    • For measuring on vernier calipers, first read the main scale reading at the edge of the thimble, then read the thimble scale reading opposite the datum line, thimble scale has 50 divisions each division is equal to 0.01 mm, so multiply the thimble scale reading with 0.01 mm. Then add the both readings.

      Reply
  1. What if we say that EMF: This is the process on which the cell manage to convert chemical and mechanical energy into electrical energy.

    Reply
      • What is the zero error as shown below? Ans: -0.7 mm
        Which of the following is a scalar quantity?
        1:the heat needed to boil some water
        2:the effort needed to hammer a nail into wood
        3:the braking force needed to stop a car
        4:the thrust needed to lift a rocket off the ground

        Correct answer: 1

        Reply
        • If a vernier caliper has a minus/negative error, you have to count from the end of the vernier scale. In this case, counting from the end of the vernier scale, the points on the vernier scale and main scale line up at 0.7 mm (0.3 mm if counted from the front). Hence, the vernier caliper has a zero error of -0.7mm. Hope this helps. πŸ™‚

          Reply
    • Question 9. See the diagram for a micrometer screw Gaugae or use a real one in order to close on an object use a thimble but in order to get an accurate answere by avoiding squeezing of the object a ratchet is used.

      Reply
    • for question 8.
      the question asked for quantities consisting of vector.
      vector has 6 quantities,which are: force, acceleration, momentum, velocity, weight, displacement
      i usually memorize them by “famvwd” which is^^^^^^^^^^^^^^^^^^^^^^^^^^^
      Hope it helps.=)

      Reply
  2. Question 3, I believe there’s an error. The correct answer given is Vernier Caliper, however theres a value of 1.37mm. A vernier caliper can only measure up to 1 decimal point, whereas the micrometer screw gauge can measure up to 2 decimal points..

    Reply

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