Cambridge A Level ยท 9702 ยท Paper 4 ยท A Level structured questions
Physics 9702/42 May/June 2021 past paper
Cambridge A Level Physics (9702) Paper 4 (A Level structured questions), variant 2, May/June 2021: the question paper and its official mark scheme, 11 questions worth 92 marks, with the grade thresholds. Free to open, no account needed.
- Questions
- 11
- Marks
- 100
- Grade A from
- 55
File names: 9702_s21_qp_42 ยท 9702_s21_ms_42
Grade thresholds for 9702/42 May/June 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 |
|---|---|---|---|---|
| 55 | 45 | 37 | 28 | 19 |
Topics in this paper
Which syllabus chapters 9702/42 May/June 2021 tested, by marks. Each chapter links to every past-paper question on it.
| Chapter | Questions | Marks |
|---|---|---|
| Magnetic fields | 2 | 19 |
| Thermodynamics | 1 | 9 |
| Oscillations | 1 | 9 |
| Electric fields | 1 | 9 |
| D.C. circuits | 1 | 9 |
| Quantum physics | 1 | 9 |
| Capacitance | 1 | 8 |
| Alternating currents | 1 | 8 |
| Gravitational fields | 1 | 6 |
| Medical physics | 1 | 6 |
Questions in 9702/42 May/June 2021
- Question 1
(a) Define gravitational field strength. (b) An isolated planet is a uniform sphere of radius โฆ
- Question 2
- Question 3
A U-shaped tube contains some liquid. The liquid column in each half of the tube has length L, as shown in Fig. โฆ
- Question 5
(a) An isolated metal sphere of radius r is charged so that the electric potential at its surface is V0. On Fig. 5.1, sketch the variation with distance x from the centre of the sphere of the electric potential. Your โฆ
- Question 6
(a) Two flat metal plates are held a small distance apart by means of insulating pads, as shown in Fig. 6.1. metal plate metal plate insulating pad Fig. 6.1 Explain how the plates could act as a capacitor. (b) The โฆ
- Question 7
(a) Two properties of an ideal operational amplifier (op-amp) are infinite input impedance and infinite bandwidth. State what is meant by: (i) infinite input impedance (ii) infinite bandwidth. (b) A student uses a negative temperature coefficient thermistor in the circuit โฆ
- Question 8
(a) Define magnetic flux density. (b) Electrons, each of mass m and charge q, are accelerated from rest in a vacuum through a potential difference V. Derive an expression, in terms of m, q and V, for the final speed โฆ
- Question 9
(a) State two situations in which a charged particle in a magnetic field does not experience a force. โฆ
- Question 10
(a) By reference to heating effect, explain what is meant by the root-mean-square (r.m.s.) value of an alternating current. (b) The variations with time t of two currents I1 and I2 are shown in Fig. 10.1 and Fig. โฆ
- Question 11
(a) State the purpose of computed tomography (CT scanning). (b) Outline the principles of CT scanning.
- Question 12
(a) State what is meant by a photon. (b) A stationary nucleus of samarium-157 (157 62 Sm) emits a gamma-ray (ฮณ-ray) photon of energy 0.57 MeV. Determine, for one ฮณ-ray photon: (i) its wavelength wavelength = m (ii) its momentum. โฆ
Other Physics papers from May/June 2021
- 9702/11 Multiple choice
- 9702/12 Multiple choice
- 9702/13 Multiple choice
- 9702/21 AS structured questions
- 9702/22 AS structured questions
- 9702/23 AS structured questions
- 9702/41 A Level structured questions
- 9702/43 A Level structured questions
- 9702/51 Planning, analysis & evaluation
- 9702/52 Planning, analysis & evaluation
- 9702/53 Planning, analysis & evaluation