S2.8.8 For the adult
Circuit drawings
How can I draw a circuit so anyone can read it?
What this chapter teaches
Symbols let us draw a circuit quickly, and a drawing can tell us whether the bulb will light. Trace the loop: a gap, an open switch or a missing cell means the bulb stays dark.
Three questions to ask
There is no one right wording. Listen for the idea.
- How can you tell from a drawing whether the bulb will light?
- What would you change to make a dark circuit light?
- Why does an open switch stop the whole loop and not only part of it?
After the chapter, the learner can
- Draw a circuit using symbols for a cell, bulb, wire and switch
- Predict from a drawing whether a bulb will light
What they copy into their notebook
A cell is a long line and a short line. A bulb is a circle with a cross. A switch has a lever. A bulb lights only in a complete loop. A gap or an open switch stops it.