There are three steps in this episode.
In the first step an extra battery is added to the circuit. This is compared to the simple circuit studied up to this point.
Then, this same simple circuit is compared to one where there are two bulbs in a single loop.
Finally, the simple circuit is compared to one in which there are two bulbs, but each is on its own loop.
Prepare for teaching across the topic using these links
topic kitset topic path core ideas (topic) decisions to make (topic) suggestions (for the topic) topic issues
This is a nugget in the PN thread – connect all three threads from any link
Physics Narrative (PN) Teaching & Learning Issues(TL) Teaching Approaches(TA)