AQA A-Level Physics Paper 3 (3BE), June 2025
Every question from AQA A-Level Physics Paper 3 (3BE), June 2025 (7408): 5 questions, 35 marks, each with its mark scheme and topic.
- Question 1 8 marks
Complete the circuit diagrams for a digital timer using binary counters and logic gates, construct a logic network from a Boolean expression, and determine the equivalent single gate for a combinational logic circuit.
Optional topics · 3.13 Electronics (A-level only)
- Question 2 7 marks
Explain the operation of an op-amp oscillator circuit, calculate reference switching voltages, and determine the pulse rate frequency and duty cycle from an oscilloscope trace.
Optional topics · Physics · 3.13 Electronics (A-level only) · 3.5 Electricity
- Question 3 8 marks
Analyze a multi-stage light-intensity monitor using a photodiode and operational amplifiers, including drawing a non-inverting amplifier circuit and determining the threshold irradiance from a calibration graph.
Optional topics · 3.13 Electronics (A-level only)
- Question 4 6 marks
Explain carrier waves and the role of an LC resonance filter circuit in radio reception, and determine the more suitable circuit from resonance curves.
Optional topics · 3.13 Electronics (A-level only)
- Question 5 6 marks
Explain the necessary conditions, advantages, and disadvantages of ground wave, sky wave, and space wave transmission pathways between a transmitter and receiver not in line of sight.
Optional topics · 3.13 Electronics (A-level only)