Energy and Voltage in Circuits
2 marks · EasyExplain why, in a series circuit, if one lamp goes out, all the others go out as well.
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Also accept: Because in a series circuit the current must pass through every lamp; if one lamp fails, the circuit is broken and current cannot flow, so all lamps go out.
Common mistakes: Saying 'because there is not enough voltage' without mentioning current path
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Marking points
B1 · 1 mark · Explains that current in a series circuit travels through all components.
B2 · 1 mark · Mentions that breaking the circuit stops current and all lamps go out.
Worked solution
In a series circuit, current flows through every component. If one lamp goes out, it creates a gap in the circuit, so current cannot flow and all lamps go out.