Choose a focused resource
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.
GCSE Physics resources
AQA GCSE Electricity
AQA GCSE Electricity Revision
Electricity questions reward careful definitions and circuit rules. Keep current, charge, potential difference, resistance, power and energy as separate quantities.
Start here
Your route through this topic
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.
By the end, you should be able to…
- Explain choose a focused resource using precise physics language.
- Apply the relevant equations, diagrams or practical method to an exam-style situation.
- Use the mini quizzes and practice answers to identify and correct a misconception.
Core learning content
Learn the idea before you practise it
Start with this short teaching sequence for AQA GCSE Electricity Revision. Read the model, use the visual, then test your recall before moving into examples and exam practice.
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.
Use the right relationship
Choose a relationship because of the physical change in the question, not because it is familiar. Charge and current: Q = It (C, A, s). Potential difference: V = E ÷ Q (V, J, C). Resistance: V = IR (V, A, Ω). Keep the unit next to each value while you substitute.
What a strong answer does
Use precise definitions, show the relevant working and link each conclusion to the physics evidence in the question. Before writing, underline the command word and identify the information that matters. Keep a calculation as equation, substitution and answer with unit; keep an explanation as a linked chain using because, so or therefore. Finish by checking that the final sentence answers the exact context in the question and that the number, direction or conclusion agrees with the evidence given.
Retrieval practice
Quick checks
Answer without looking back first. The feedback explains the model, so a wrong answer still helps you learn.
Mini quiz 1
Starter: quantities
Mini quiz 2
Circuit rules
Mini quiz 3
Calculate and check
Worked examples
See the method being built
Cover the answer, attempt the method and then compare your physics language as well as the number.
Example 1 · Current from charge
A charge of 120 C passes a point in 60 s. Calculate the current.
- Use I = Q ÷ t.
- Substitute I = 120 ÷ 60.
- Include amperes.
Show the answer
2.0 A.
Example 2 · Resistance
A component has a potential difference of 12 V and a current of 3.0 A. Calculate its resistance.
- Rearrange V = IR to R = V ÷ I.
- R = 12 ÷ 3.0.
- State the unit Ω.
Show the answer
4.0 Ω.
Example 3 · Domestic energy
A 2.0 kW heater runs for 3.0 h. Calculate the energy transferred in kWh.
- Use energy in kWh = power in kW × time in h.
- E = 2.0 × 3.0.
Show the answer
6.0 kWh.
Misconception clinic
Common wrong turns
Each of these is tempting because it sounds almost right. Replace it with the precise physics before you meet it in a question.
- Putting an ammeter in parallel.
- Saying that potential difference is the flow of charge.
- Adding resistances in parallel as if they were in series.
- Using kW with seconds without converting units.
Independent practice
Exam-style questions
Use the working space first. Reveal the guidance only after you have committed to an answer, then improve the exact part that would gain the next mark.
1. State the unit of charge.
[1 mark]Show answer and marking guidance
Coulomb (C).
2. A 12 V lamp draws 0.50 A. Calculate its power.
[2 marks]Show answer and marking guidance
P = VI = 12 × 0.50 = 6.0 W.
3. Explain why an ammeter must be connected in series.
[3 marks]Show answer and marking guidance
It measures the current through the component, so the same charge flow must pass through the meter.
4. Describe one difference between series and parallel circuits.
[2 marks]Show answer and marking guidance
Current is the same in series; potential difference is the same across parallel branches.
5. Why does a filament lamp’s resistance increase as it gets hotter?
[2 marks]Show answer and marking guidance
The metal ions vibrate more, causing more collisions with electrons and reducing the current for a given potential difference.
6. Suggest one control variable for a resistance practical.
[3 marks]Show answer and marking guidance
Keep the length and material of the wire constant when investigating another factor.
Focused revision
Choose one idea at a time
When you are ready to go narrower, each focused page follows the same learning route: explain, check, explore, diagnose and practise.
EL-01
Current, Charge and Potential Difference
Current is charge flowing per second, while potential difference is the energy transferred per coulomb. Use Q = It and V = E/Q to connect the measurements to the particle and energy models.
EL-02
Resistance and I-V Characteristics
Resistance is the ratio V/I for a component at a particular point. A fixed resistor is approximately ohmic at constant temperature, while a filament lamp and diode have non-linear current-potential difference relationships.
EL-03
Series and Parallel Circuits
Use conservation of charge at junctions and the idea of shared potential difference. In series current is constant; in parallel the branches have the same potential difference and the total current is the sum of branch currents.
EL-04
Mains Electricity, Power, Energy and Safety
Appliance power ratings describe the rate of energy transfer. Use P = VI or E = Pt, and understand why the live wire, neutral wire, earth wire, fuse and plastic insulation have different safety roles.
EL-05
Resistance Required Practical
Change one factor such as wire length, keep material and cross-sectional area constant, measure current and potential difference, and calculate resistance for each reading. The circuit should be switched off between readings to limit heating.
EL-06
I-V Characteristics Required Practical
Reverse the power supply for negative potential differences and record pairs of current and potential difference. Use a suitable scale and explain the different curve shapes for a resistor, filament lamp and diode.
Keep going
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Questions pupils ask
GCSE Physics FAQs
What is the key idea in AQA GCSE Electricity Revision?
Electricity questions reward careful definitions and circuit rules. Keep current, charge, potential difference, resistance, power and energy as separate quantities.
How should I practise AQA GCSE Electricity Revision?
Read the snapshot, attempt the worked examples without looking, complete the mini quizzes and then use the practice questions to check your wording and method.
Next step
Keep your revision moving
Physics sticks when you move between explanation, retrieval and application.