plumiMOSFET (metal-oxide semiconducting field-effect transistor): AQA A‑Level Physics questions
AQA A-Level Physics past-paper questions on 3.13.1.1 MOSFET (metal-oxide semiconducting field-effect transistor), 2008–2025, with mark schemes and examiner’s reports where available.
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All 9 questions on MOSFET (metal-oxide semiconducting field-effect transistor), as a list
- June 2023, Paper 3 Electronics, Q05 (6 marks): Figure 10 shows a circuit that has an input signal which is a noisy square wave. The circuit is used to remove the noise and switch a motor M on and off. Figure
- November 2021, Paper 3 Electronics, Q01.1 (1 mark): State the name of the part shown in this MOSFET structure that causes the input resistance to be very large. [1 mark]
- November 2021, Paper 3 Electronics, Q01.2 (1 mark): Which terminal of the MOSFET is connected directly to 0 V when it is used as a simple switch? Tick () one box. [1 mark] drain gate source
- November 2021, Paper 3 Electronics, Q01.3 (2 marks): Deduce the minimum value of VGS needed for the lamp to operate at full power. [2 marks] VGS = V
- November 2021, Paper 3 Electronics, Q01.4 (3 marks): Figure 3 shows an individual MOSFET. The drain–source leakage current IDSS for this MOSFET is about 10 nA. Figure 4 shows a microchip where millions of MOSFETs
- June 2019, Paper 3 Electronics, Q04.6 (1 mark): Output Q from Figure 13 becomes the input to the final part of the circuit shown in Figure 14. Figure 14 The circuit uses a MOSFET to activate a relay. State on
- Specimen, Paper 3 Electronics, Q01.1 (2 marks): MOSFETs are commonly used in circuits where low power consumption is important to extend battery life. State and explain the property of MOSFET devices that mak
- Specimen, Paper 3 Electronics, Q01.2 (2 marks): Figure 1 shows an N-channel enhancement mode MOSFET, being used as part of a circuit for the water level alarm in a garden pond. When the gap between the copper
- Specimen, Paper 3 Electronics, Q01.3 (2 marks): The circuit is tested by immersing the copper strips in the water, and bringing them closer together until the alarm sounds. Vth for the MOSFET in Figure 1 is 2
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