Physics questions and solutions

Browse original practice and official past-paper questions. Each question has its own link, with its source and worked solution.

498 questions · Page 5 of 21

1. Q28 · 2023 QCAA · Paper 1 · 2 marks
   The Feynman diagram for a neutron decaying into a proton and electron is shown.

   Describe the significance of the electron antineutrino in this particle interaction.
   Question and worked solution
2. Q1 · 2023 QCAA · Paper 2 · 3 marks
   Describe the effects of relativistic travel on an object.
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3. Q2 · 2023 QCAA · Paper 2 · 5 marks
   In a frictionless system, object A rests on an inclined plane and object B undergoes horizontal circular motion. The two objects are connected by a length of string as shown.

   Determine the speed of object B needed for object A to remain stationary. Show your working.
   Question and worked solution
4. Q3 · 2023 QCAA · Paper 2 · 8 marks
   Three charges are in a straight line as shown.
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5. Q4 · 2023 QCAA · Paper 2 · 3 marks
   Two objects on different planets experience different accelerations due to gravity.

   Object Mass (kg) Acceleration due to gravity (m s-2) A 79 1.6 B 32 3.7

   Determine which object has the greatest force acting on it. Show your working.
   Question and worked solution
6. Q5 · 2023 QCAA · Paper 2 · 4 marks
   Describe what happens when light is shone onto a metallic surface in the context of the photoelectric effect.
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7. Q6 · 2023 QCAA · Paper 2 · 10 marks
   A ball is thrown with an initial velocity of $8.0\,\mathrm{m\,s^{-1}}$ into a bucket as shown.
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8. Q7 · 2023 QCAA · Paper 2 · 5 marks
   Discuss the nature of light by describing evidence from two key experiments.
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9. Q8 · 2023 QCAA · Paper 2 · 6 marks
   A length of wire, AB, is placed across an incomplete loop sitting within a magnetic field as shown. Wire AB then moves with a constant velocity of $40\,\mathrm{m\,s^{-1}}$, creating an induced EMF of $23\,\mathrm{\mu V}$.
   Question and worked solution
10. Q1 · 2022 QCAA · Paper 1 · 1 mark
    Electromotive force is
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11. Q2 · 2022 QCAA · Paper 1 · 1 mark
    A photon is described as
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12. Q3 · 2022 QCAA · Paper 1 · 1 mark
    Which free body diagram best represents an object being pulled at a constant speed up an inclined plane?
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13. Q4 · 2022 QCAA · Paper 1 · 1 mark
    An object orbiting Earth has an orbital period of 5.6 × 103 s. What is the object’s orbital radius?
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14. Q5 · 2022 QCAA · Paper 1 · 1 mark
    Tau particles are classified as
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15. Q6 · 2022 QCAA · Paper 1 · 1 mark
    After coherent light has been passed through a double slit, the observation of an interference pattern on a screen is explained by the
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16. Q7 · 2022 QCAA · Paper 1 · 1 mark
    Which change would produce the greatest increase in magnetic field strength inside a current-carrying solenoid?
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17. Q8 · 2022 QCAA · Paper 1 · 1 mark
    Determine the wavelength of an electromagnetic wave with an energy of 2.4 × 10−23 J.
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18. Q9 · 2022 QCAA · Paper 1 · 1 mark
    Which diagram would result in the furthest horizontal distance travelled?
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19. Q10 · 2022 QCAA · Paper 1 · 1 mark
    Electric field strength refers to the
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20. Q11 · 2022 QCAA · Paper 1 · 1 mark
    The maximum kinetic energy of an electron ejected from a metallic surface can be increased by
    Question and worked solution
21. Q12 · 2022 QCAA · Paper 1 · 1 mark
    An object experiencing uniform circular motion in a horizontal plane travels at an average speed of 8.0 m s−1. Calculate the radius of the object’s path if it takes 0.3 s to complete a full rotation.
    Question and worked solution
22. Q13 · 2022 QCAA · Paper 1 · 1 mark
    A rectangular coil of 3000 turns and dimensions 0.1 m × 0.2 m is rotated in a uniform magnetic field of 2 mT. Calculate the minimum number of revolutions per second required to produce an average EMF of 6 V.
    Question and worked solution
23. Q14 · 2022 QCAA · Paper 1 · 1 mark
    Which Feynman diagram correctly depicts neutron decay?
    Question and worked solution
24. Q15 · 2022 QCAA · Paper 1 · 1 mark
    An object’s velocity can only be measured relative to
    Question and worked solution