ElectricityTopic Summary
Topic Summary: Potential Difference
Part of Potential Difference — GCSE Physics
This topic summary covers Topic Summary: Potential Difference within Potential Difference for GCSE Physics. Revise Potential Difference in Electricity for GCSE Physics with 14 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 14 of 14 in this topic. Use this topic summary to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 14 of 14
Practice
14 questions
Recall
30 flashcards
Topic Summary: Potential Difference
Key Terms
- Potential difference: Energy per unit charge (V)
- Volt: 1 J per coulomb
- EMF: Energy given by supply per coulomb
- Voltmeter: Measures p.d.; in parallel
Key Facts
- Series: voltages add up to supply
- Parallel: same voltage across each branch
- Voltmeter in parallel; ammeter in series
- 1 V = 1 J/C
Key Equations
- V = E / Q
- E = V × Q
- Q = E / V
Exam Tips
- Voltmeter = parallel (always)
- Series: missing V = supply − others
- Parallel: all branches = supply voltage
- State units: V, J, C