IB Physics (SL & HL) topical questions with answers
Every IB Physics topic, with free past-paper-style questions and full mark schemes. Pick a chapter to practise its questions, or generate a complete SL & HL-format paper in seconds, from easy warm-ups to A*-level "brutal" papers.
Paper 1A · SL multiple choice (SL · 25 questions · part of Paper 1 (1h 30m)); Paper 1B · SL data-based questions (SL · 20 marks · 2 questions on experimental data); Paper 2 · SL structured questions (SL · 50 marks · 1h 30m); Paper 1A · HL multiple choice (HL · 40 questions · part of Paper 1 (2h)); Paper 1B · HL data-based questions (HL · 20 marks · 2 questions on experimental data); Paper 2 · HL structured questions (HL · 90 marks · 2h 30m).
Sample IB Physics questions
A mixed set from across the syllabus. Questions marked A* challenge come from the hardest bank.
Question 1Multiple choice · 1 markA* challenge
An ideal gas is taken once round a closed cycle. Which statements are correct? I. The net thermal energy supplied to the gas equals the net work done by the gas. II. No thermal energy is transferred during an isothermal stage. III. The net work done by the gas equals the area enclosed by the cycle on a p–V diagram.
A I and II only
B I and III only
C II and III only
D I, II and III
Show answer
Answer: B
Question 2Multiple choice · 1 mark
A driver travelling at 30 m s−1 sees an obstacle. Her reaction time is 1 s and the car then decelerates uniformly at 6 m s−2. What is the total stopping distance?
A 68 m
B 75 m
C 110 m
D 180 m
Show answer
Answer: C
Question 3Multiple choice · 1 mark
An electron is accelerated from rest through a potential difference of 500 V. What is its final speed?
A 3.1 × 105 m s−1
B 9.4 × 106 m s−1
C 1.3 × 107 m s−1
D 1.8 × 107 m s−1
Show answer
Answer: C
Question 4Structured · 8 marksA* challenge
Light of wavelength 400 nm falls on a metal surface of work function 2.3 eV.
(a)
Calculate the photon energy in eV.
[1]
(b)
Calculate the maximum kinetic energy of the emitted electrons and the stopping potential.
[3]
(c)
Calculate the threshold frequency.
[2]
(d)
The intensity of the light is doubled. State the effect on the stopping potential and on the photocurrent.
[2]
Show answers and mark scheme
Part
Answer and marking points
Marks
(a)
3.1 eV
hc/λ = 4.97 × 10−19 J = 3.1 eV ✓
1
(b)
0.81 eV; 0.81 V
Ek = 3.11 − 2.3 ✓ = 0.81 eV (1.3 × 10−19 J) ✓ stopping potential 0.81 V ✓
A block of mass 0.4 kg on a horizontal frictionless surface is attached to a spring of spring constant 40 N m−1. It is displaced 3 cm from equilibrium and released.
(a)
State the defining condition for simple harmonic motion.
[2]
(b)
Calculate the period of the oscillation.
[2]
(c)
Calculate the maximum speed and the maximum acceleration of the block.
[2]
(d)
Sketch a graph showing how the velocity of the block varies with time for one period, starting from release.
[2]
(e)
The block is replaced by one of four times the mass, released from the same displacement. State and explain the effect on the period and on the maximum speed.
[2]
Show answers and mark scheme
Part
Answer and marking points
Marks
(a)
a ∝ −x
acceleration is proportional to displacement from equilibrium ✓ and directed towards equilibrium (a = −ω2x) ✓
2
(b)
0.628 s
T = 2π√mk✓ 0.628 s ✓
2
(c)
0.300 m s−1; 3.00 m s−2
vmax = ωA = 0.300 m s−1✓ amax = ω2A = 3.00 m s−2✓
2
(d)
−sine curve
sinusoidal curve starting at zero, going negative first ✓ amplitude and period consistent with (b) and (c) ✓
2
(e)
T doubles, v halves
the period doubles (T ∝ √m) ✓ the maximum speed halves: same energy ½kA2 with four times the mass ✓
2
Question 6Structured · 4 marks
A mass on a spring oscillates vertically with amplitude 3.0 cm and period 0.80 s.
(a)
Calculate the angular frequency.
[1]
(b)
Calculate the maximum speed and maximum acceleration.
[2]
(c)
State where in the oscillation the kinetic energy is a maximum.
[1]
Show answers and mark scheme
Part
Answer and marking points
Marks
(a)
7.9 rad s−1
ω = 2π/T = 7.85 rad s−1✓
1
(b)
0.24 m s−1; 1.8 m s−2
vmax = ωx₀ = 0.24 m s−1✓ amax = ω2x₀ = 1.8 m s−2✓
2
(c)
at equilibrium
at the equilibrium position ✓
1
Frequently asked questions
Are these real SL & HL past paper questions?
No. They are original questions written to match the IB Physics SL & HL syllabus and the style of real IB papers, so you can practise beyond the past papers you have already done.
Do the Physics questions have answers?
Yes. Every question on these pages has its answer, and every generated paper comes with a full IB-style mark scheme you can download as a PDF.
Can I make a full IB Physics practice paper?
Yes. Choose the paper (Paper 1A · SL multiple choice, Paper 1B · SL data-based questions, Paper 2 SL structured questions, Paper 1A · HL multiple choice, Paper 1B · HL data-based questions, Paper 2 HL structured questions), the topics, the marks and the difficulty, and the generator builds a fresh paper with the same number and style of questions as the real exam.
Want a mentor, not just a paper?
Riyaz Shaikh has mentored IGCSE, IB and A Level students for 15+ years, one-on-one, online and in Mumbai. The hardest questions on this site are the ones he uses to find a student's weak points.
Original IB-style practice questions written for mentorriyaz.in. These are not IB past paper questions, and this site is not affiliated with or endorsed by the International Baccalaureate Organization. Updated 2026-11-04. Paper generator · mentorriyaz.in