How to Ace VCE Physics: Insights from the 2025 Examiner's Report

VCE Physics tests far more than the ability to substitute into formulas. The 2025 examiner's report shows that students handled single-step calculations well, but lost many marks on multi-step problems, explanations and practical investigation skills.

This guide breaks down the 2025 VCE Physics examiner's report question by question. It covers how students performed in each section, which questions were easiest and hardest, and the specific mistakes that cost marks. For the previous year's analysis, see our 2024 VCE Physics examiner's report breakdown.

Key Takeaways

• Students averaged 62% correct on the multiple-choice section. In three questions (3, 8 and 11), a wrong answer was more popular than the correct one.
• The hardest question in the exam was Section B Question 11b (85% scored zero), a multi-step power transmission problem.
• Motion questions were the strongest area. Students averaged about 84% of the marks on circular motion (Question 4).
• The practical investigation (Question 19, 20 marks) averaged only about 50%. Fewer than 10% of students correctly identified all the variables.
• The examiners repeatedly recommended practising complex, multi-step application problems and knowing the study design's experimental design content.

VCE Physics Examination Structure

VCE Physics has a single end-of-year examination with two sections.

The whole exam runs for 2 hours and 30 minutes (plus 15 minutes of reading time), is worth 120 marks and contributes 50% of the study score. School-assessed coursework makes up the other 50%.

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Easiest and Hardest Questions in the 2025 Exam

Easiest questions

• Section A, Question 15 (91% correct): If two diffraction patterns match through the same slit width, the wavelengths must be the same.
• Section B, Question 2a (94% full marks): Calculating impulse (I = mΔv = 60 N s).
• Section B, Question 4a (88% full marks): Calculating the centripetal force on a car (3000 N).

Hardest questions

• Section A, Question 3 (27% correct): 51% chose D. This conservation of momentum question required a consistent sign convention.
• Section A, Question 11 (30% correct): 33% chose C. RMS voltage is defined as the AC voltage that delivers the same average power as a DC voltage of the same value.
• Section B, Question 11b (85% scored zero): Finding the number of lamps a shed could power by working through voltage drop, line current and power.
• Section B, Question 2c (71% scored zero): Using the area under a force–displacement graph to find a maximum force.

Section A: Multiple-Choice Question Breakdown

The table below shows each Section A question, its topic, the correct answer, the percentage of students who answered correctly and the most common wrong answer, as published in the 2025 examiner's report.

Source: VCAA, 2025 VCE Physics external assessment report. Topic labels are our own.

Performance by Area of Study

Key Takeaways From Section A

• Strongest performance: Diffraction (Q15), static fields (Q7), length contraction (Q16) and identifying systematic and random errors (Q18) were answered well.
• Fields questions caused the most difficulty: Coulomb's law (Q8, 33%) and work done in a circular orbit (Q9, 36%) were among the hardest questions in the section.
• Definitions matter: Many students knew how to calculate RMS values but couldn't identify the correct definition (Q11).

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What Section A Taught Us: Skills, Advice and Common Mistakes

Key Skills to Focus On

• Sign conventions: Assign a positive direction before applying conservation of momentum (Q3).
• Proportional reasoning: In Question 8, a 9Q charge exerts the same force at three times the distance, so r_Q = 5.0 cm.
• Work and force direction: No work is done when a force acts at 90° to the direction of motion, such as gravity on a satellite in a circular orbit (Q9).
• Linearising data: For an object dropped from rest, v = √(2as), so a graph of v against √s is a straight line with a gradient of √(2a) (Q20).

Examiner Advice to Students

• Know the definitions precisely: RMS voltage (Q11), inertial frames of reference (Q14, which cannot be accelerating) and static fields (Q7) were all tested directly.
• Interpret data physically: In Question 19, an acceleration with no applied force suggested an extra constant force, such as the bench sloping.
• Know which experiments show what: Absorption spectra provide evidence for discrete energy levels. Diffraction, interference and photocurrent do not (Q17).

Common Mistakes in Section A

• Field directions (Q5): Fields around a point mass and around a negative point charge both point inwards.
• Forces on a current loop (Q6): 30% chose C. The force directions on each side depend on the direction of the current in that side and the field from the wire.
• AC calculations (Q12): Peak voltage is V_RMS × √2 = 339 V, and the period is 1/f = 0.02 s. 25% chose B.
• Motor torque (Q13): Increasing resistance lowers the current and therefore the torque.

Section B: Short-Answer Question Breakdown

The table below shows each Section B question, its topic and the percentage of students who received each mark, along with the average mark.

Source: VCAA, 2025 VCE Physics external assessment report. Topic classifications are our own.

Performance by Area of Study

Averages are calculated from the published per-question averages and are approximate.

Key Observations From the Examiner's Report

• Strongest performance: Questions 2a (impulse, 94% full marks), 4a (centripetal force, 88%), 1a (projectile time, 84%) and 11a (current in a lamp, 84%) were answered best. Single-step substitution questions were generally well done.
• Most challenging questions: Questions 11b (85% scored zero), 2c (71%), 6b (68%), 19g.i (67%) and 19d (63%) were the hardest.
• Multi-step problems were the biggest weakness: The examiners singled out Questions 11b and 13 (de Broglie wavelength and accelerating voltage) as problems that needed physics understanding, not just mathematics. They recommend spending more time on complex, application-type problems.
• Graphing was a strength: In the practical investigation, 56% of students earned full marks for plotting the graph (Q19e, average 4.0 out of 5).

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What Section B Taught Us: Skills, Examiner Advice and Common Errors

Key Skills for Section B

• Multi-step reasoning: Plan the chain of calculations before starting. For example, in Question 11b: voltage drop, then line current, then power in the shed, then number of lamps.
• Graph analysis: Use areas under graphs (work from a force–displacement graph) and gradients and intercepts (Planck's constant and the work function).
• Explanations linked to the scenario: Explanations must refer to the specific magnet, coil, satellite or collision in the question, not give generic definitions.
• Experimental design: Identify the independent, dependent and controlled variables, explain the purpose of repeated measurements, and calculate gradients from a line of best fit.

Examiner Advice to Students

• Show complete substitutions in "show that" questions: In Question 8a, a full substitution had to be shown to earn the marks.
• Convert units and use the right radius: Errors included not converting cm to m (5a), mm and nm (15a), and using the altitude instead of adding it to Earth's radius (8a and 8b).
• Be specific to the question: In Question 10a, answers like "the magnet has a changing field", or a definition of Lenz's law, didn't address the falling magnet and the solenoid.
• Restate your reasoning in later parts: Unless the question says so, an answer to an earlier part can't be used when marking a later part. In Question 15b, students needed to explicitly explain why the fringe spacing increased.
• Use points on the line of best fit: When finding a gradient, show (y₂ − y₁)/(x₂ − x₁) using points that lie on the line, not raw data points (16a and 19f).
• Follow the instructions in the stem: In Question 19g.i, the stem said to use the gradient from part f. Substituting data from the table earned no marks.
• Know the study design: Only 37% knew that repeated measurements reduce the effect of random errors (19d), which is stated in the study design.

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Common Mistakes Made in Section B

#### Motion

• Projectile motion (Q1d): The most common error was saying the curved path takes longer. Horizontal velocity doesn't affect vertical motion, so the fall time is the same.
• Airbags (Q2b): Simply quoting I = FΔt wasn't enough. Answers needed to compare the two collisions: the same change in momentum over a longer time means a smaller force.
• Force–displacement graphs (Q2c): Many students treated the area under the graph as impulse (60 N s) instead of work (360 J), or misread when the collision occurred.
• Force diagrams (Q3a): Drawing an extra "F_net" arrow was wrong, because the snowboarder moves at a constant speed.
• Stopping distance (Q3c): The most common error was using v² = u² + 2as with g as the acceleration, instead of a work–energy approach.
• Banked tracks (Q4b): The angle uses tan⁻¹(v²/rg), not sin or cos.

#### Fields

• Combining fields (Q5b): Many students used kqq/r² instead of adding the two electric fields as vectors.
• Energy gained by an electron (Q6b): Kinetic energy gained depends only on voltage (qV = ½mv²), so it is unchanged by plate separation. Many students correctly said the force or acceleration would change but didn't explain why the final energy stays the same.
• Charge sign (Q7a): The most common incorrect answer, "upwards", came from using the right-hand rule without accounting for the electron's negative charge.
• Orbits (Q8c): Only a third earned both marks. Answers needed Newton's second law: the unbalanced gravitational force causes acceleration towards Earth. Many referred to the first or third laws.
• Changing gravitational field (Q9): Assuming g stays constant as the spacecraft moves away overestimates the work required.

#### Electricity and Electromagnetic Induction

• Opposite peaks in an EMF graph (Q10b): Very few students explained the change from increasing to decreasing flux. Many said the magnetic field "changed direction".
• Transformers (Q11c.ii): Most students explained the step-up transformer but not why the voltage must be stepped down at the shed.
• Induced EMF (Q12c): The most common error was using 0.02 s as the time instead of 0.0050 s.
• DC generators (Q12d): Answers needed to name the split-ring commutator and explain that it reverses the connections every half turn. Many described its role in a motor instead.

#### Light, Matter and Relativity

• de Broglie wavelength (Q13): Many students wrongly used E = hc/λ for an electron, which applies the speed of light to a particle.
• Michelson–Morley (Q14): Answers needed to mention the two perpendicular paths and state Einstein's postulate fully: the speed of light is constant for all observers, regardless of their relative motion.
• Interference vs diffraction (Q15b): There is ongoing confusion between the two. Many students used the slit separation as "w" in a diffraction argument.
• Work function (Q16b): The work function is the y-intercept (2.2 eV). Common errors included misreading the axes or using the wrong value of h.
• Lorentz factor (Q17): γ can never be less than 1. Calculating γ = 0.990 led to square roots of negative numbers.
• Emission arrows (Q18b): An arrow pointing up shows absorption, not emission. A line with no arrow also lost the mark.

#### Practical Investigation (Question 19)

• Variables (Q19a): Fewer than 10% earned full marks. Common errors were listing several variables in each box, listing equipment as variables, or not stating which variable was independent, dependent or controlled.
• Forces on parallel wires (Q19b): There is no force when the current is parallel to the field. "Because the currents flow in opposite directions" was a common incorrect reason.
• Graphing (Q19e): Use all the available space when choosing a scale, don't place data points at equal spacing along the x-axis when their values aren't equally spaced, and don't swap the axes.
• Gradients (Q19f): The most common error was leaving out the × 10⁻⁶ in the calculation.

Conclusion

Students in 2025 were confident with single-step calculations, motion and graph plotting. The marks that separated students came from multi-step problems, precise explanations and experimental design.

To improve your score:

• practise multi-step application problems, planning each step before calculating
• learn the study design's definitions and key ideas, especially in the scientific investigation outcome
• always convert units and show full substitutions
• link every explanation to the specific scenario in the question.

For more preparation:

• read how one of our tutors scored a 49 in VCE Physics
• see everything you need to know about VCE Physics
• check how Physics scaled in the 2025 VCE scaling report
• see the VCE exam timetable 2026 for this year's exam dates.

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Source: VCAA, 2025 VCE Physics external assessment report.