How much electricity flows into the networks of bulbs A, C, and D? ...What can y

Question

How much electricity flows into the networks of bulbs A, C, and D? ...What can you say about the flow through the branch that includes C and D? (give your answer in terms of f)

How much of the flow f passes through bulb C?

What can you say about the flow through bulb A? (Give your answer in terms of f). Explain

Circuit 1 :A This allows you to treat the network of bulbs A, C and D as a single component. In the same way, the network of bulbs B and E is also treated as a single component. This makes circuit one much simpler to think about: two components in series with a battery. This is often a good way to begin thinking about a circuit if we have no information about the flow anywhere in the circuit. Of course, then you have to separately analyze the networks surrounded with dotted boxes. You'll know about the total flow from the battery from the previous step. Now you'll be in a better position to think about how that flow travels through each network The network on the right is the simpler of the two. Compare the flow through B to the flow through E. Explain Suppose that the flow out of the network of bulhs B and E is f. How large is the flow through bulb B and the flow through bulb E? Explain. (Give your answer in terms of f.) 1I You probably made an assumption to answer the second of these questions. You probably assumed (correctly!) that sum of the flow through bulb B and the flow through bulb E was the same as the flow into & out of the

Explanation / Answer

as current in the network of B and E = f

current through B = current through E = f/2

current in the network of A, C and D = f

current through C = current through D = f/3

current through A = f/3 + f/3 = 2f/3

brightness order, A > B = E > C = D

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