Name: PROBLEM 3-8 points In this circuit, the bulb fixed resistance R ng a [2 po

Question

Name: PROBLEM 3-8 points In this circuit, the bulb fixed resistance R ng a [2 points] (a) With the switch open, which bulb is the brightest? JA B JC JD In one sentence, provide a simple justification to support your answer 12 points] (b) When the switch is closed, which bulb is the brightest? CA B I iC ID In one sentence, provide a simple justification to support your answer [2 points] (c) Considering the two cases above, which bulb is the brightest? I JThe one that is brightest when the switch is open DI The one that is brightest when the switch is closed I J These bulbs are equally bright In one sentence, provide a simple justification to support your answer. en the switch is closed, which bulb or bulbs become brighter than they were when [2 points] (d) Wh the switch was open? Select all that apply t, JA IXI c

Explanation / Answer

(a) A and D

When the switch is open, the second branch/path allows no current since the path is broken. So all current pass through bulbs A and D (and thus B and C are not lit).

Same current passes through each since they are in series and they also have the same R value. Thus they have the same power (P =I2R) . So they have the same brightness.

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