WAEC Physics questions: Measurements and units

12 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· WAEC

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

   • Apressure
   • Bdensity
   • Cmomentum
   • Dpower

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   Explanation and discussion

3. Question 3· Measurements and units· WAEC

   Which of these units is NOT a base SI unit?

   • Amole
   • Bampere
   • Ckelvin
   • Djoule

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4. Question 4· 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

5. Question 5· Measurements and units· WAEC

   The S.I. unit of power is the

   • Ajoule
   • Bwatt
   • Cnewton
   • Dpascal

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6. Question 6· 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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7. Question 7· 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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8. Question 8· Measurements and units· WAEC

   Mass is measured with a

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

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9. Question 9· Measurements and units· WAEC

   The dimensions of velocity are

   • AMLT⁻¹
   • BLT⁻²
   • CLT⁻¹
   • DML⁻³

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10. Question 10· Measurements and units· WAEC

    The SI unit of thermodynamic temperature is the

    • Adegree Celsius
    • Bkelvin
    • Cdegree Fahrenheit
    • Djoule

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11. Question 11· Measurements and units· WAEC

    What are the dimensions of momentum?

    • AML⁻¹T
    • BMLT⁻²
    • CML²T⁻¹
    • DMLT⁻¹

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    Explanation and discussion

12. Question 12· Measurements and units· WAEC

    The SI unit of electric charge is the

    • Acoulomb
    • Bampere
    • Cvolt
    • Dohm

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    Explanation and discussion