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 1 of 21

1. Q1 · 2025 QCAA · Paper 1 · 1 mark
   Normal force is the force that always
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2. Q2 · 2025 QCAA · Paper 1 · 1 mark
   Newton’s Law of Universal Gravitation can be described by the formula
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3. Q3 · 2025 QCAA · Paper 1 · 1 mark
   A proton travelling to the right enters a region with a magnetic field, as shown.

   In which direction will the proton be deflected as it passes through the magnetic field?
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4. Q4 · 2025 QCAA · Paper 1 · 1 mark
   Electromagnetic waves always
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5. Q5 · 2025 QCAA · Paper 1 · 1 mark
   A satellite orbits around a planet. If the radius of the satellite’s orbit were to increase by a factor of 4, its period would increase by a factor of
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6. Q6 · 2025 QCAA · Paper 1 · 1 mark
   Which moving object has an inertial frame of reference?
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7. Q7 · 2025 QCAA · Paper 1 · 1 mark
   What key feature differentiates the Bohr model of the atom from the Rutherford model?
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8. Q8 · 2025 QCAA · Paper 1 · 1 mark
   A uniform electric field was produced in a vacuum using a set of parallel plates. A stationary electron was placed between the plates and then released, as shown.

   If all gravitational effects are ignored, the stationary electron between the plates will
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9. Q9 · 2025 QCAA · Paper 1 · 1 mark
   The W boson mediates
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10. Q10 · 2025 QCAA · Paper 1 · 1 mark
    A string with a length of 0.60 m is connected to a small mass of 0.50 kg. The mass is swung in a horizontal circle and the tension in the string is 4.8 N. Calculate the speed of the mass.
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11. Q11 · 2025 QCAA · Paper 1 · 1 mark
    Electromotive force is produced when a magnet is pushed into a solenoid. The magnitude of the electromotive force is inversely proportional to the
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12. Q12 · 2025 QCAA · Paper 1 · 1 mark
    A wire with a length of 0.2 m and a current of 2.4 A is placed in an external uniform magnetic field of 1.5 mT, as shown. Its angle, $\theta$, is varied from $0^\circ$ to $90^\circ$.

    As the angle $\theta$ changes from $0^\circ$ to $90^\circ$, the magnetic force will
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13. Q13 · 2025 QCAA · Paper 1 · 1 mark
    Questions 13–14 refer to the following scenario. A projectile was launched with a velocity of $31\,\mathrm{m\,s^{-1}}$ at an angle of $28^\circ$ to the horizontal.

    Calculate the horizontal component of the launch velocity of the projectile in the forward direction.
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14. Q14 · 2025 QCAA · Paper 1 · 1 mark
    Questions 13–14 refer to the following scenario. A projectile was launched with a velocity of $31\,\mathrm{m\,s^{-1}}$ at an angle of $28^\circ$ to the horizontal.

    Calculate the maximum height the projectile reached above its starting point.
    Question and worked solution
15. Q15 · 2025 QCAA · Paper 1 · 1 mark
    Questions 15–16 refer to the following scenario. Researchers conducted a photoelectric effect experiment in which light was shone on two unknown metals, R and X. The results were analysed to produce the graph shown.

    The graph for metal X has a theoretical gradient equivalent to
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16. Q16 · 2025 QCAA · Paper 1 · 1 mark
    Questions 15–16 refer to the following scenario. Researchers conducted a photoelectric effect experiment in which light was shone on two unknown metals, R and X. The results were analysed to produce the graph shown.

    The work function for metal R is
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17. Q17 · 2025 QCAA · Paper 1 · 1 mark
    Mesons and baryons
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18. Q18 · 2025 QCAA · Paper 1 · 1 mark
    The graph shows four possible representations of the relationship between relativistic momentum and the speed of an object.

    Identify the trendline that is a true representation of this relationship.
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19. Q19 · 2025 QCAA · Paper 1 · 1 mark
    A magnet moves right towards a stationary coil, as shown.

    The table shows possible scenarios for the direction of the induced current across the resistor and the change in the flux inside the coil as the magnet moves towards it. Which row is correct?
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20. Q20 · 2025 QCAA · Paper 1 · 1 mark
    When a black body is heated, a graph with a distinctive peak is produced, as shown.

    This black body curve can be used to demonstrate that
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21. Q21 · 2025 QCAA · Paper 1 · 3 marks
    A box on a frictionless inclined plane is held in place by a rope, as shown.

    Determine the magnitude of the tension in the rope. Show your working.
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22. Q22 · 2025 QCAA · Paper 1 · 3 marks
    An electron is moved through a change in electric potential from 2.0 V to 8.0 V.

    Calculate the work done to the electron. Show your working.
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23. Q23 · 2025 QCAA · Paper 1 · 5 marks
    View question and marking material
    Question and worked solution
24. Q24 · 2025 QCAA · Paper 1 · 9 marks
    A monochromatic light source was shone on a metal surface and photoelectrons were ejected. A different light source of lower frequency was then shone on the same metal surface. No photoelectrons were ejected, even when the intensity of the light was increased.
    Question and worked solution