Edexcel IGCSE Physics 2.7 Series & parallel circuits

Practise comparing series and parallel circuits using circuit diagrams, total resistance, current paths and practical choices such as lighting.

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 2.7 Series and parallel circuits 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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2.7 Series and parallel circuits question 1