plumiThermionic emission of electrons: AQA A‑Level Physics questions
AQA A-Level Physics past-paper questions on 3.12.1.2 Thermionic emission of electrons, 2008–2025, with mark schemes and examiner’s reports where available.
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Q01.1
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All 9 questions on Thermionic emission of electrons, as a list
- June 2025, Paper 3 Turning points, Q01.1 (3 marks): A modern version of Thomson’s apparatus uses thermionic emission in the production of the electron beam. Suggest how the electron beam is produced in this moder
- June 2023, Paper 3 Turning points, Q01.1 (1 mark): Explain how the electrons that form the beam are emitted. [1 mark]
- June 2023, Paper 3 Turning points, Q01.2 (1 mark): Show that the maximum speed of the electrons in the beam is about 1.3 × 107 m s−1. [1 mark]
- November 2021, Paper 3 Turning points, Q01.1 (4 marks): Explain how high-speed electrons are produced in the apparatus in Figure 1. In your answer you should: • name parts A and B • discuss the purposes of potential
- June 2018, Paper 3 Turning points, Q01.1 (3 marks): Describe the process that releases the electrons emitted at the filament. [3 marks]
- June 2017, Paper 3 Turning points, Q03.1 (1 mark): What is the process by which electrons are produced in an electron gun? Tick () the correct box. [1 mark] Beta particle emission Electron diffraction Photoelec
- June 2012, PHYA5 Turning points (old spec), Q1(c) (3 marks): The beam of electrons was produced by thermionic emission from a heated filament. When the potential difference between the anode and the filament was 4200V, th
- June 2010, PHYA5 Turning points (old spec), Q1(a)(i) (2 marks): State and explain the effect on the beam of electrons of increasing the filament current. (2 marks)
- June 2010, PHYA5 Turning points (old spec), Q1(a)(ii) (2 marks): State and explain the effect on the beam of electrons of increasing the anode potential. (2 marks)
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