← Electronics syllabus

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Component 1: Circuit concepts

4 dot points across 4 inquiry questions. Click any dot point for a focused answer with worked past exam questions where available.

What are charge, current and voltage, and how do we measure them?

Electric charge and current as the rate of flow of charge, the charge equation, voltage (potential difference) as energy per unit charge, standard circuit symbols, and the test equipment used to measure electrical quantities (multimeter, oscilloscope, logic probe).
A focused answer to WJEC Eduqas GCSE Electronics on charge, current and voltage, covering charge and the current equation, voltage as energy per unit charge, standard circuit symbols, and the test equipment used to measure them.
9 min answer →

How do we calculate the electrical power dissipated by a component and the energy it transfers?

Electrical power and energy, the power equations linking power to voltage, current and resistance, the energy equation, and using them to choose a suitable power rating for a component.
A focused answer to WJEC Eduqas GCSE Electronics on electrical power and energy, covering the power equations, the energy equation, and choosing a suitable power rating for a resistor or other component.
9 min answer →

How are voltage, current and resistance linked, and what do current-voltage graphs tell us?

Resistance and Ohm's law, the equation linking voltage, current and resistance, and the current-voltage (I-V) characteristics of an ohmic resistor, a filament lamp and a silicon diode.
A focused answer to WJEC Eduqas GCSE Electronics on resistance and Ohm's law, covering the equation linking voltage, current and resistance and the I-V characteristics of a resistor, a filament lamp and a diode.
9 min answer →

How do current and voltage behave in series and parallel circuits?

The current and voltage (potential difference) rules for series and parallel circuits, including the conservation of current at a junction and the sharing of voltage around a loop, and using them to analyse simple circuits.
A focused answer to WJEC Eduqas GCSE Electronics on the current and voltage rules for series and parallel circuits, covering how current is conserved at junctions and how voltage is shared around a loop, and applying them to analyse circuits.
9 min answer →