This comparison covers Series vs Parallel: Complete Comparison within Series & Parallel Circuits for GCSE Physics. Revise Series & Parallel Circuits in Electricity for GCSE Physics with 20 exam-style questions and 30 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 16 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
⚖️ Series vs Parallel: Complete Comparison
| Property | Series Circuit | Parallel Circuit |
|---|---|---|
| Current | Same everywhere: I₁ = I₂ | Splits at junctions: I = I₁ + I₂ |
| Voltage | Shared: V = V₁ + V₂ | Same across each branch: V₁ = V₂ |
| Resistance | Adds up: R = R₁ + R₂ | Less than smallest: 1/R = 1/R₁ + 1/R₂ |
| If one breaks | Whole circuit stops | Other branches keep working |
| Real-world use | Old Christmas lights, simple switches | Household wiring, modern lights |
Practice questions for Series & Parallel Circuits
In a series circuit, what is true about the current at all points?
A student adds an extra lamp to a parallel circuit. Explain how this affects the total current from the supply and the brightness of the original lamps.
Quick recall flashcards
Current in series circuits?
SAME everywhere (I₁ = I₂ = I₃) — only one path for current
Voltage in series circuits?
ADD UP to equal supply voltage (V_supply = V₁ + V₂ + V₃)