plumiMotion of charged particles: OCR A‑Level Physics A questions
Every OCR A-Level Physics A exam question on 6.3.2 Motion of charged particles, 2016–2025, with its mark scheme and examiner’s report.
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Q6(b)(i)
The whole paper ↗![June 2024 Paper 3, question 6(b)(i): Suggest why the magnetic force acting on the proton has a different magnitude at X than at Y. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55603-jun24-06-bi-qp.webp?v=3)
Q6(b)(ii)
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Q6(b)(iii)
The whole paper ↗![June 2024 Paper 3, question 6(b)(iii): 1 Calculate the magnitude of the resultant force on the proton at Y. resultant force = N [2] 2 Explain why the motion of the proton at Y is not instantaneously](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55603-jun24-06-biii-qp.webp?v=3)
Q24(c)
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Q20(a)
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Q2(a)
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Q2(b)(ii)
The whole paper ↗![June 2017 Paper 3, question 2(b)(ii): the potential difference V between the shaded faces of the slice. V = V [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h55603-jun17-02-bii-qp.webp?v=3)
All 14 questions on Motion of charged particles, as a list
- June 2025, Paper 2, Q11 (1 mark): A proton with kinetic energy 1.6 × 10–17 J is travelling at right angles to a magnetic field. The magnetic flux density is 0.050 T. What is the magnitude of the
- June 2024, Paper 2, Q11 (1 mark): At the Earth’s equator the magnetic flux density B is approximately 25 μT. What is the magnitude of the force on an electron with velocity v = 100 km s–1 as it
- June 2024, Paper 3, Q6(b)(i) (1 mark): Suggest why the magnetic force acting on the proton has a different magnitude at X than at Y. [1]
- June 2024, Paper 3, Q6(b)(ii) (4 marks): At X, the motion of the proton is instantaneously equivalent to motion in a circle at a constant speed. Calculate the radius of this circular motion. radius = m
- June 2024, Paper 3, Q6(b)(iii) (4 marks): 1 Calculate the magnitude of the resultant force on the proton at Y. resultant force = N [2] 2 Explain why the motion of the proton at Y is not instantaneously
- June 2023, Paper 2, Q5 (1 mark): The diagram shows the path of a nucleus entering a magnetic field. nucleus magnetic field out of paper In which direction does the force on the nucleus act as i
- June 2022, Paper 2, Q7 (1 mark): A particle is moving at right angles to a uniform magnetic field of flux density B. The particle has mass m, charge q and moves in a circular arc of radius r in
- November 2021, Paper 2, Q24(c) (3 marks): Beta-minus particles (electrons) emitted from a radioactive source have a range of speeds. Describe and explain how a uniform magnetic field can be applied in t
- June 2019, Paper 2, Q20(a) (3 marks): Each rubidium ion has charge +1.6 × 10–19 C and speed 4.8 × 104 m s–1. The radius of the semi-circular path of the ions is 0.18 m. The mass of a rubidium ion is
- June 2018, Paper 2, Q10 (1 mark): A charged particle moves in a circular path of radius 1.2 cm in a uniform magnetic field. path of charged particle region of uniform magnetic field The directio
- June 2017, Paper 2, Q11 (1 mark): An electron moves in a circle of radius 2.0 cm in a uniform magnetic field of flux density 170 mT. What is the momentum of this electron? 3.4 × 10−3 kg m s−1 A
- June 2017, Paper 2, Q13 (1 mark): A beam of charged particles is not deflected when it passes through a region where both electric and magnetic fields are present. Which statement is not correct
- June 2017, Paper 3, Q2(a) (3 marks): As soon as the current is switched on, the moving electrons in the current are forced towards the shaded rear face of the slice where they are stored. This caus
- June 2017, Paper 3, Q2(b)(ii) (1 mark): the potential difference V between the shaded faces of the slice. V = V [1]
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