Answer:
(3) series with one current pathway
Explanation:
For the other lights to be cut-off when one light goes off implies a series connection of lights. Since only in a series connection would all other elements dependent on the current source be cutoff if one element is cutoff.
We want to see which type of connection we have here, we will see that the correct option is (3), series with one current pathway.
There are two general types of connections in circuits.
Series, where all the elements are one after the other. This means that the second element (lights in this case) only can function if the first does.
We also have the parallel connection, here the circuit bifurcates and in each bifurcation we have elements. So, if for example, one of these elements is broken and does not work, the other element (in other bifurcation) will still get the current needed to work, thing that would not happen in a series connection if the first element is broken.
Now in our case, when one lightbulb blows out, the entire string goes out. So the strings must be connected in series. We will use only one current pathway (having multiple current pathways means that we have a parallel connection, but a series connection in each bifurcation).
So the correct option is (3) series with one current pathway
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