Build the circuit model
Current is the rate of flow of charge. Potential difference is the energy transferred per coulomb. Resistance describes how difficult it is for current to pass through a component at a given potential difference.
GCSE Physics resources
AQA GCSE Electricity
Electricity questions reward careful definitions and circuit rules. Keep current, charge, potential difference, resistance, power and energy as separate quantities.
Topic overview
Use the resource cards below to revise one idea at a time. Each page includes worked examples, mini quizzes, practice questions, exam language and a visual or simulation when it adds learning value.
Knowledge map
Use this overview to find the part of the topic that needs attention; the focused guides below teach and assess each idea in depth.
Current is the rate of flow of charge. Potential difference is the energy transferred per coulomb. Resistance describes how difficult it is for current to pass through a component at a given potential difference.
In series, current is the same everywhere and the potential differences add. In parallel, the potential difference across each branch is the same and the current splits between branches.
A correct circuit diagram, a controlled variable and a suitable graph are often worth more marks than a long method. State what is measured, what is changed and what is kept constant.
Focused revision
Each guide combines explanation, a diagnostic check, misconception repair, worked examples and exam-style practice.
A circuit transfers energy while charge circulates. Track how much charge passes each second separately from how much energy each coulomb transfers.
V = IR can describe a measured operating point. Predicting another point with the same R requires evidence that resistance stays constant.
Circuit topology chooses the rule. A series route carries every coulomb through each component; parallel branches connect between the same two points.
An appliance rating connects charge flow to energy transfer. A protective earth path and a fuse work together when a metal case becomes live.
Resistance is calculated from a measured pair of potential difference and current. Keep the wire’s temperature steady so changing length is the only intended cause.
A characteristic needs enough measured operating points to reveal its shape. Measuring one resistance does not establish proportionality.
Static charge is an imbalance of electrons. It creates an electric field that can exert a force without contact.
Across every topic
Useful next steps