Cambridge A Level · 9702 · Paper 4 · A Level structured questions
Physics 9702/42 Feb/March 2021 past paper
Cambridge A Level Physics (9702) Paper 4 (A Level structured questions), variant 2, Feb/March 2021: the question paper and its official mark scheme, 10 questions worth 84 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 10
- Marks
- 100
- Grade A from
- 57
File names: 9702_m21_qp_42 · 9702_m21_ms_42
Grade thresholds for 9702/42 Feb/March 2021
The minimum raw marks Cambridge set for each grade on this component (out of 100). Thresholds change every session and variant, so always compare your score with the paper you actually sat.
| A | B | C | D | E |
|---|---|---|---|---|
| 57 | 51 | 42 | 32 | 21 |
Topics in this paper
Which syllabus chapters 9702/42 Feb/March 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Magnetic fields | 2 | 18 |
| Gravitational fields | 1 | 12 |
| Quantum physics | 1 | 10 |
| Oscillations | 1 | 9 |
| Temperature | 1 | 8 |
| Alternating currents | 1 | 8 |
| Electric fields | 1 | 7 |
| Ideal gases | 1 | 6 |
| Nuclear physics | 1 | 6 |
Questions in 9702/42 Feb/March 2021
- Question 1
(a) State Newton’s law of gravitation. (b) Planets have been observed orbiting a star in another solar system. Measurements are made of the orbital radius r and the time period T of each of these planets. The variation with R3 …
- Question 2
A fixed mass of an ideal gas is at a temperature of 21 °C. The pressure of the gas is …
- Question 3
(a) Using a simple kinetic model of matter, describe the structure of a solid. (b) The specific latent heat of vaporisation is much greater than the specific latent heat of fusion for the same substance. Explain this, in terms of …
- Question 4
(a) The defining equation of simple harmonic motion is …
- Question 6
(a) State a similarity between the gravitational field lines around a point mass and the electric field lines around a point charge. (b) The variation with radius r of the electric field strength E due to an isolated charged sphere …
- Question 8
(a) Two long straight wires P and Q are parallel to each other, as shown in Fig. 8.1. There is a current in each wire in the direction shown. The pattern of the magnetic field lines in a plane normal …
- Question 9
(a) Define magnetic flux linkage. (b) A solenoid of diameter 6.0 cm and 540 turns is placed in a uniform magnetic field as shown in Fig. 9.1. diameter 6.0 cm magnetic field solenoid 540 turns Fig. 9.1 The variation with …
- Question 10
The output potential difference (p.d.) of an alternating power supply is represented by …
- Question 11
(a) Electrons are accelerated through a potential difference of 15 kV. The electrons collide with a metal target and a spectrum of X-rays is produced. (i) Explain why a continuous spectrum of energies of X-ray photons is produced. (ii) Calculate …
- Question 12
(a) Radioactive decay is both spontaneous and random. State what is meant by: 1. spontaneous decay 2. random decay. (b) Strontium-90 (90 38 Sr) is an unstable nuclide. The activity of a sample of …