Edexcel IGCSE Physics 2.7 Series and Parallel Circuits Questions

Compare current, voltage and total resistance across series and parallel branches, then use those differences to explain real circuit choices.

Exam points

explain how adding a parallel branch changes total resistance and battery current
compare series and parallel layouts for bulbs or loudspeakers using paths and shared voltage
choose a suitable circuit for lighting, giving a practical advantage or disadvantage

[Maximum number: 2]

The diagram shows a domestic lighting circuit.

Figure for Question Edexcel IGCSE Physics 2.7 Series and Parallel Circuits Questions question 1 — Edexcel IGCSE Physics

Explain an advantage of using this circuit for domestic lighting.

idea that lamps can be controlled independently;
(because) circuit is a parallel circuit;
allow some lights on whilst others off / if one lamp blows the others still work etc.
allow all lamps get full voltage
$/ 230 \mathrm{~V}$
allow idea that lamps are on
(three) separate
paths/branches of the circuit

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Edexcel IGCSE Physics 2.7 Series and Parallel Circuits Questions question 1