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switch
A switch controls a gap in the path.
Class 4 · Bangla Version · General science
Electric circuits and safety
Explore electric circuits and safety with an example and your own answers.
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
A simple battery circuit needs a complete conducting path. A switch opens or closes that path. Use only supervised low-voltage kits, never wall sockets.
Worked example
A cell, wires and a suitable bulb can make a complete circuit. A gap in the wire interrupts the path.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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no
The complete conducting path has been interrupted.
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copper
Copper is a conductor; dry plastic is commonly used as an insulator.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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cell
A cell supplies energy through chemical changes.
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incomplete
The gap interrupts the path.
Write in your own words. A guardian or teacher should review this response.
Show model answer and explanation
The loop provides a complete conducting path; a gap interrupts current.
Check a closed loop and a clear explanation. Do not use sockets, mains electricity or real components for this task.
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