lesson
Open the path or close it
1 · Learn
A switch can open or close a circuit path. An open switch creates a gap, so a simple series lamp circuit is incomplete. A closed conducting switch completes that part of the path.
Closed does not guarantee the lamp lights if another connection is broken or a component fails. Check the whole circuit, not only the switch position.
2 · Worked example
I close the switch but a wire is disconnected elsewhere. The lamp still stays off because the loop remains incomplete.
3 · Your turn
In a working simple lamp circuit, what happens when its series switch opens?
Check your answer
The lamp goes out because the conducting loop is broken.
4 · Apply your learning
An adult helps add an approved switch to the low-voltage lamp circuit. Compare open and closed and draw both states.
Adult guidance and safety
Keep to an approved low-voltage kit and disconnect between changes. No household switches, socket wiring or improvisation with mains parts.
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With an adult, look at a safe real example or a checked photograph. Name the example and say which you used. Record what you actually notice. Do not taste plants or materials, approach unknown animals or invent missing observations.
Ask your teacher for support with the method and recording. A prediction is what you think might happen; an observation is what you actually see, hear or feel safely.
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