SI units: past paper questions

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• Question 1May/June 2026, paper 11Multiple choice1 mark

  What is an SI base quantity?

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• Question 3Oct/Nov 2025, paper 11Multiple choice1 mark

  What are the SI base units of the watt?

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• Question 1Oct/Nov 2024, paper 11Multiple choice1 mark

  What are the SI base units for the moment of a force?

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• Question 2Oct/Nov 2023, paper 11Multiple choice1 mark

  Which quantity is not an SI base quantity?

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• Question 16May/June 2026, paper 11Multiple choice1 mark

  What is a unit for density?

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• Question 22Oct/Nov 2025, paper 11Multiple choice1 mark

  What are the SI base units of stress?

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• Question 1Oct/Nov 2024, paper 12Multiple choice1 markHas a diagram

  A physical quantity consists of a magnitude and a unit. Which row does not show a correct combination of a quantity and its unit?

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• Question 2Oct/Nov 2023, paper 12Multiple choice1 mark

  Which quantity is an SI base quantity?

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• Question 2May/June 2026, paper 12Multiple choice1 mark

  What are the base units for intensity?

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• Question 3Oct/Nov 2025, paper 12Multiple choice1 mark

  Which physical quantity could have units of ${\text{N s}}^2{\text{m}}^{-1}$?

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• Question 19Oct/Nov 2024, paper 12Multiple choice1 mark

  What is a unit for stress?

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• Question 1Oct/Nov 2025, paper 22Structured11 marks

  Scientists are investigating the variation in air pressure at different locations on a mountain. The scientists take measurements of several physical quantities at each location.

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• Question 3Oct/Nov 2024, paper 13Multiple choice1 mark

  The power output $P$ of a star can be modelled with the equation $$P=\sigma A{T}^4$$ where $\sigma$ is a constant, $A$ is the surface area of the star and $T$ is the surface temperature of the star. What are the SI base units of $\sigma$?

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• Question 1Oct/Nov 2023, paper 22Structured9 marksHas a diagram

  In the following list, underline all quantities that are SI base quantities. charge electric current force time

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• Question 2May/June 2025, paper 12Multiple choice1 mark

  What is $0.25\text{ kN}{\text{ mm}}^{-2}$ expressed in $\text{N}{\text{ m}}^{-2}$?

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• Question 1Oct/Nov 2024, paper 22Structured7 marksHas a diagram

  State what is meant by a vector quantity.

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• Question 1May/June 2023, paper 11Multiple choice1 mark

  Which unit is not an SI base unit?

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• Question 4May/June 2025, paper 12Multiple choice1 mark

  The time period $T$ of a pendulum is given by $$T=2\pi {\left(\frac{L}{g}\right)}^n$$ where $L$ is the length of the pendulum and $g$ is the acceleration of free fall. The equation is homogeneous. What is the value of $n$?

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• Question 1May/June 2024, paper 11Multiple choice1 mark

  Which unit is an SI base unit?

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• Question 2May/June 2024, paper 11Multiple choice1 mark

  Which of the following could have the same units as force?

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• Question 8May/June 2024, paper 11Multiple choice1 mark

  An aircraft flies from London to Sydney in a time of $21\text{ hours }40\text{ minutes}$. The distance travelled is $17000\text{ km}$. What is the average speed of the aircraft?

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• Question 2May/June 2023, paper 13Multiple choice1 mark

  What is the ohm expressed in SI base units?

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• Question 18May/June 2024, paper 11Multiple choice1 mark

  Which statement about efficiency is correct?

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• Question 1May/June 2023, paper 21Structured5 marks

  Define power.

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• Question 1May/June 2024, paper 13Multiple choice1 mark

  What is equal to $0.000005\text{ J}$?

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• Question 1May/June 2023, paper 22Structured6 marks

  Define pressure.

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• Question 16May/June 2024, paper 13Multiple choice1 mark

  What is a unit of power?

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• Question 1May/June 2024, paper 21Structured10 marksHas a diagram

  The drag force F_D acting on an object falling through air is given by F_D = 1/2 Cρ Av² where A is the cross-sectional area of the object, v is the velocity of…

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• Question 1May/June 2024, paper 22Structured10 marksHas a diagram

  The list below shows some SI quantities. Underline the quantity that is not an SI base quantity. charge current length time

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• Question 1May/June 2024, paper 23Structured10 marksHas a diagram

  The drag force $F_{\text{D}}$ acting on a sphere falling through a liquid is given by $$F_{\text{D}}=6\pi \eta rv$$ where $r$ is the radius of the sphere, $v$ is the speed of the sphere in the liquid and $\eta$ is a property of the liquid called the viscosity.

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