plumiReal operational amplifiers: AQA A‑Level Physics questions
AQA A-Level Physics past-paper questions on 3.13.4.4 Real operational amplifiers, 2008–2025, with mark schemes and examiner’s reports where available.
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Q03.5
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All 5 questions on Real operational amplifiers, as a list
- June 2025, Paper 3 Electronics, Q03.5 (1 mark): When the monitor is tested, the LED turns on fully. However, the LED does not turn off fully when the irradiance falls below the critical value. Suggest one rea
- June 2023, Paper 3 Electronics, Q04.1 (2 marks): A particular operational amplifier has the following properties: • open-loop gain = 1 × 105 • break frequency (cutoff frequency) = 10 Hz • gain × bandwidth = 1
- June 2023, Paper 3 Electronics, Q04.3 (2 marks): The value of Rf in the feedback loop in Figure 9 is increased. State and explain the effect of this change on the bandwidth of the inverting amplifier. [2 marks
- June 2018, Paper 3 Electronics, Q02.4 (2 marks): The ultrasound frequency detected by the sensor is 50 kHz For this operational amplifier gain × bandwidth = 1.0 MHz Discuss whether this operational amplifier i
- June 2008, PHA9W (2008 spec), Q4(b) (2 marks): 4 (b) The bandwidth of an amplifier increases when negative feedback is used. Explain the terms: bandwidth negative feedback (2 marks)
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