PROBLEM 3-8 points In this circuit, the bulbs are identical, with each bulb havi

Question

PROBLEM 3-8 points In this circuit, the bulbs are identical, with each bulb having a fixed resistance R. [2 points] (a) With the switch open, which bulb is the brightest? A D In one sentence, provide a simple justification to support your answer [2 points] (b) When the switch is closed, which bulb is the brightest? JA In one sentence, provide a simple justification to support your answer. 1 B 1 D 2 points] (c) Considering the two cases above, which bulb is the brightest? ]The one that is brightest when the switch is open I 1The one that is brightest when the switch is closed These bulbs are equally bright In one sentence, provide a simple justification to support your answer [2 points] (d) When the switch is closed, which bulb or bulbs become brighter than they were when the switch was open? Select all that apply. I JA 1B I 1C I 1D

Explanation / Answer

a) D is brightest potential difference across D is more, but resistance of all bulb is same. Hence D consume more power and more bright.

b) B is bright. In branch B resistance is less for same potential difference, hence consume more power and becomes brighter.

C) bulb B is brightest. Potential difference across B is V EMF of cell.

D) Bulb B turns brighter.

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