England · WJEC EduqasSyllabus
Electronics syllabus, dot point by dot point
Every dot point in the England Electronicssyllabus, with a focused answer for each one. Click any dot point for a worked explainer, past exam questions, and links to related dot points. Written by Claude Opus 4.8, Anthropic's latest AI.
Component 1 Principles of Electronics
Module overview →- How does adding an op-amp to a filter give gain, a sharper roll-off and no loading?Active filters: op-amp low-pass and high-pass filters, the cut-off frequency, pass-band gain, band-pass filters, and the advantages over passive filters.13 min answer →
- How is an audio signal amplified efficiently and faithfully, from microphone to loudspeaker?Audio systems: the audio chain, voltage and power amplification, gain in decibels, amplifier classes (A, B and AB), crossover distortion, and bandwidth.13 min answer →
- How does an op-amp without feedback compare two voltages, and how does positive feedback give clean, noise-immune switching?Comparators and Schmitt triggers: the open-loop comparator, the difference between a comparator and an amplifier, positive feedback, hysteresis, and switching thresholds.13 min answer →
- How do we extract a tiny sensor signal from noise and condition it for the next stage?Instrumentation systems: sensors and transducers, the Wheatstone bridge, the instrumentation (difference) amplifier, common-mode rejection, and signal conditioning.13 min answer →
- How does negative feedback turn a near-perfect amplifier into precise inverting, non-inverting and summing circuits?Operational amplifiers: the ideal op-amp properties, the inverting, non-inverting, summing and difference amplifiers, the voltage follower, and the virtual earth.14 min answer →
Component 1 Principles of Electronics
Module overview →- How do we describe an alternating signal, and why does the opposition of a capacitor or inductor depend on frequency?AC signals and reactance: amplitude, peak-to-peak, period and frequency of a sinusoid, root-mean-square values, and the frequency-dependent reactance of capacitors and inductors.13 min answer →
- How do capacitors and inductors store energy, and how do they charge and discharge through a resistor?Capacitors and inductors: capacitance and stored energy, the RC time constant and exponential charge and discharge, inductance and stored energy, and combining capacitors in series and parallel.14 min answer →
- How do Ohm's law and Kirchhoff's two laws let us analyse any resistive electronic circuit?Circuit fundamentals: charge, current, voltage and resistance, Ohm's law, Kirchhoff's current and voltage laws, combining resistors in series and parallel, and electrical power.13 min answer →
- How does an RC network pass some frequencies and block others, and what is the cut-off frequency?Passive filters: RC low-pass and high-pass filters, the cut-off frequency, voltage gain in decibels, and reading a frequency-response (Bode) plot.13 min answer →
- How does a potential divider set a reference voltage and turn a sensor into a usable signal?Potential dividers: the divider equation, loading effects, and sensing circuits using thermistors, light-dependent resistors and strain gauges to convert a physical quantity into a voltage.13 min answer →
- How does Thevenin's theorem reduce a complicated network to a single source and resistance, and when is power transfer greatest?Thevenin's theorem: replacing a linear network by an equivalent electromotive force and series resistance, finding the Thevenin voltage and resistance, and the maximum power transfer condition.13 min answer →
Component 2 Application of Electronics
Module overview →- How does the 555 timer generate a continuous square wave or a single timed pulse?Timing circuits: the 555 timer in astable mode (frequency, period and duty cycle) and monostable mode (pulse duration), and oscillators for clock generation.14 min answer →
- How are numbers represented in binary and hexadecimal, and how are signed numbers added with two's complement?Number systems: binary, denary and hexadecimal conversion, binary addition, two's complement for signed numbers, and binary-coded decimal.13 min answer →
- How do we design a combinational logic circuit from a truth table, and minimise it with a Karnaugh map?Combinational logic design: deriving a Boolean expression from a truth table (sum of products), minimising with Karnaugh maps, and standard building blocks (half and full adders, decoders, encoders, multiplexers).14 min answer →
- How do chained flip-flops count clock pulses and shift data, and how is the count length set?Counters and shift registers: the ripple (asynchronous) counter, the synchronous counter, modulo-n counting and resetting, and serial and parallel shift registers.13 min answer →
- How do logic gates, truth tables and Boolean algebra let us describe and simplify digital logic?Logic gates and Boolean algebra: the gates AND, OR, NOT, NAND, NOR, XOR and their truth tables, Boolean expressions, the laws of Boolean algebra, De Morgan's laws, and universal gates.14 min answer →
- How does feedback give a logic circuit memory, and how do the SR, D and JK flip-flops behave?Sequential logic: the difference from combinational logic, the SR latch, the clocked D-type and JK flip-flops, edge triggering, and the flip-flop as a one-bit memory.14 min answer →
Component 2 Application of Electronics
Module overview →- How is a microcontroller programmed in assembly language to read inputs, make decisions and drive outputs?Assembly language programming: instructions and registers, reading inputs and writing outputs, branching and loops, delays, and the program development cycle (flowchart, code, assemble, test).14 min answer →
- What is inside a microcontroller, and how does it connect to the inputs and outputs of a system?Microcontroller architecture: the CPU, memory and input/output ports, digital input and output pins, pull-up and pull-down resistors, and the analogue-to-digital converter and PWM peripherals.13 min answer →
- How is a complete electronic system designed as subsystems, built, tested and evaluated for the non-exam assessment?System design and realisation: the systems approach (input, process, output and power subsystems), block diagrams, systematic testing and fault-finding, evaluation against a specification, and health and safety.13 min answer →
- How does a microcontroller connect safely to sensors and to motors, and how does feedback close the loop?Interfacing a microcontroller: input interfacing (signal conditioning, switch debouncing, the ADC), output interfacing (transistor and MOSFET drivers, relays, motor control with PWM and an H-bridge), and the closed-loop control system.13 min answer →
Component 1 Principles of Electronics
Module overview →- How do bipolar and MOSFET transistors act as current amplifiers and voltage-controlled switches?Transistors: the bipolar junction transistor as a current amplifier with current gain, the MOSFET as a voltage-controlled device, the common-emitter amplifier, and biasing.14 min answer →
- How does a diode conduct in only one direction, and how is that used to rectify an alternating supply?Diodes and rectification: the diode characteristic and forward voltage, light-emitting and Zener diodes, half-wave and full-wave (bridge) rectification, and reservoir smoothing.13 min answer →
- How does a low-power control signal safely switch a large electrical load?High power switching systems: relays and the flyback diode, power MOSFETs, the thyristor and triac for AC loads, and pulse-width modulation for power control.13 min answer →
- How is mains AC turned into a smooth, regulated DC supply for an electronic system?Mains power supply systems: the transformer, rectifier, reservoir smoothing and regulation stages, ripple voltage, and series and switch-mode regulators.13 min answer →
- How is a transistor used as a switch to turn a load on and off from a small control signal?Transistor switching: saturation and cut-off, choosing the base resistor, the Darlington pair, and driving output transducers such as lamps, LEDs, buzzers and motors.13 min answer →
Component 1 Principles of Electronics
Module overview →- How is a continuous analogue signal turned into a digital code, and what sets its accuracy?Analogue-to-digital conversion: sampling, quantisation and resolution, the sampling theorem and aliasing, quantisation error, and the trade-off between resolution and data rate.13 min answer →
- How is a binary code turned back into an analogue voltage, and how is the staircase output smoothed?Digital-to-analogue conversion: the summing-amplifier (binary-weighted) DAC, the R-2R ladder, resolution and the analogue output, and reconstruction filtering.13 min answer →
- Why must a signal be modulated onto a carrier to be transmitted, and how do AM, FM and digital modulation work?Communications and wireless transmission: the need for a carrier, amplitude and frequency modulation, bandwidth, digital modulation (ASK, FSK), and the radio transmitter and receiver chain.13 min answer →
- How is digital data sent over a link, and how do many signals share one channel?Digital communications: serial and parallel transmission, the data rate (bit rate and baud), multiplexing (time-division and frequency-division), and error detection with parity and checksums.13 min answer →
- How is information sent as light along an optical fibre, and why does it outperform copper?Optical communication: the optical link (LED or laser source, fibre, photodiode receiver), total internal reflection, attenuation and bandwidth, and the advantages over copper.13 min answer →