JAMB and WAEC Physics questions: Measurements and units

26 questions with answers and explanations. Tap an option to check yourself.

1. Question 1· Measurements and units· WAEC

   Which of the following quantities is measured in kg/m³?

   • APressure
   • BDensity
   • CMomentum
   • DForce

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   Explanation and discussion

2. Question 2· Measurements and units· JAMB

   The dimensions of momentum are

   • AML²T⁻¹
   • BMLT⁻²
   • CMLT⁻¹
   • DML⁻¹T⁻¹

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   Explanation and discussion

3. Question 3· Measurements and units· JAMB

   Which of the following is a fundamental quantity?

   • Adensity
   • Bvelocity
   • Cforce
   • Dtime

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   Explanation and discussion

4. Question 4· Measurements and units· JAMB

   The watt expressed in SI base units is

   • Akg m s⁻¹
   • Bkg m s⁻²
   • Ckg m² s⁻²
   • Dkg m² s⁻³

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   Explanation and discussion

5. Question 5· Measurements and units· JAMB

   Which instrument would measure the diameter of a thin wire most accurately?

   • Ameasuring tape
   • Bvernier calipers
   • Cmetre rule
   • Dmicrometer screw gauge

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   Explanation and discussion

6. Question 6· Measurements and units· JAMB

   Which of the following quantities has the same SI unit as energy?

   • Apressure
   • Bpower
   • Cmomentum
   • Dmoment of a force

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   Explanation and discussion

7. Question 7· Measurements and units· JAMB

   Which of the following is NOT a fundamental SI unit?

   • Amole
   • Bkelvin
   • Campere
   • Dnewton

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   Explanation and discussion

8. Question 8· Measurements and units· WAEC

   Which of these quantities has the unit kg m⁻³?

   • Apressure
   • Bdensity
   • Cmomentum
   • Dpower

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   Explanation and discussion

9. Question 9· Measurements and units· JAMB

   The dimensions of pressure are:

   • AMLT⁻²
   • BML⁻¹T⁻²
   • CML²T⁻²
   • DML⁻²T⁻¹

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   Explanation and discussion

10. Question 10· Measurements and units· JAMB

    The smallest reading that can be taken with a standard pair of vernier calipers is

    • A0.001 cm
    • B0.01 cm
    • C0.1 cm
    • D1 cm

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    Explanation and discussion

11. Question 11· Measurements and units· WAEC

    Which of these units is NOT a base SI unit?

    • Amole
    • Bampere
    • Ckelvin
    • Djoule

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    Explanation and discussion

12. Question 12· Measurements and units· WAEC

    The instrument best suited for measuring the diameter of a thin wire is the

    • Ametre rule
    • Bvernier calipers
    • Ctape rule
    • Dmicrometer screw gauge

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    Explanation and discussion

13. Question 13· Measurements and units· JAMB

    A micrometer screw gauge shows 5.5 mm on the sleeve and 28 divisions on the thimble, each division 0.01 mm. The reading is

    • A5.28 mm
    • B5.528 mm
    • C8.30 mm
    • D5.78 mm

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    Explanation and discussion

14. Question 14· Measurements and units· WAEC

    The S.I. unit of power is the

    • Ajoule
    • Bwatt
    • Cnewton
    • Dpascal

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    Explanation and discussion

15. Question 15· Measurements and units· WAEC

    A micrometer screw gauge has a pitch of 0.5 mm and 50 divisions on the thimble. Its least count is

    • A0.05 mm
    • B0.1 mm
    • C0.5 mm
    • D0.01 mm

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    Explanation and discussion

16. Question 16· Measurements and units· JAMB

    The dimensions of force are

    • AMLT⁻¹
    • BML²T⁻²
    • CMLT⁻²
    • DML⁻¹T⁻²

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    Explanation and discussion

17. Question 17· Measurements and units· JAMB

    The dimensions of work are

    • AMLT⁻²
    • BML²T⁻²
    • CML²T⁻¹
    • DML⁻¹T⁻²

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    Explanation and discussion

18. Question 18· Measurements and units· JAMB

    Which of the following is a derived unit?

    • Akilogram
    • Bsecond
    • Campere
    • Dnewton

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    Explanation and discussion

19. Question 19· Measurements and units· WAEC

    On a vernier caliper the main-scale reading is 2.3 cm and the 6th vernier division coincides with a main-scale mark. If the instrument reads to 0.01 cm, what is the reading?

    • A2.30 cm
    • B2.36 cm
    • C2.96 cm
    • D2.306 cm

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    Explanation and discussion

20. Question 20· Measurements and units· WAEC

    Mass is measured with a

    • Amicrometer screw gauge
    • Bspring balance
    • Cbeam balance
    • Dhydrometer

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    Explanation and discussion