← Electronics syllabus

WalesElectronics

Core Concepts

3 dot points across 3 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

How do Ohm's law, Kirchhoff's laws and the potential divider let you analyse any DC circuit?

DC electrical circuits: charge, current, voltage and resistance, Ohm's law, series and parallel resistors, Kirchhoff's current and voltage laws, the potential divider, and power.
A focused answer to the WJEC A-Level Electronics core concept of DC electrical circuits, covering current, voltage and resistance, Ohm's law, series and parallel combinations, Kirchhoff's two laws, the potential divider equation, and electrical power.
12 min answer →

How do input transducers turn physical quantities into signals, and how do output sub-systems turn signals back into useful effects?

Input and output sub-systems: sensors and input transducers (LDR, thermistor, switches) in potential dividers, and output transducers (LED, buzzer, relay, motor) with their driver and interfacing requirements.
A focused answer to the WJEC A-Level Electronics core concept of input and output sub-systems, covering input transducers such as the LDR and thermistor in potential dividers, switch inputs, and output transducers including LEDs, buzzers, relays and motors with their driver requirements.
12 min answer →

How does the systems approach let you design and analyse an electronic system as a chain of sub-systems?

System synthesis: the systems approach, block diagrams, building a system from input, process and output sub-systems, and interfacing between blocks.
A focused answer to the WJEC A-Level Electronics core concept of system synthesis, covering the systems approach, three-block input-process-output diagrams, signal flow, interfacing between sub-systems, and how complex products are built up from standard building blocks.
11 min answer →