This Week's Puzzle

### This assignment is due before 9 AM, Friday, October 20th, 2000.

• Puzzle solutions are due by 9:00 AM on Friday of each week.
• Puzzles are worth 5 points of extra credit each.
• Answers must be accompanied by valid reasoning. Just like the tests, the answer alone isn't enough!
• Each week, the first student to submit a correct answer will recieve the stylish 251 T-shirt.
• Previous winners get a "virtual t-shirt." No shirt, but a chance to win a prize with actual value at the end of the semester (often a book, or maybe software).

"Burnout"

Consider the circuit above, in which three identical lightbulbs are attached to an ideal battery. If bulb #2 burns out, which of the following will occur?

a) Bulbs #1 and #3 are unaffected. Thus, the total brightness is decreased.
b) Bulbs #1 and #3 both get brighter. The total brightness is unchanged.
c) Bulbs #1 and #3 both get dimmer. The total brightness is decreased.
d) Bulb #1 gets dimmer but #3 gets brighter. The total brightness is unchanged.
e) Bulb #1 gets brighter but #3 gets dimmer. The total brightness is unchanged.
f) Bulb #1 gets dimmer but #3 gets brighter. The total brightness is decreased.
g) Bulb #1 gets brighter but #3 gets dimmer. The total brightness is decreased.
h) Bulb #1 is unaffected but #3 gets brighter. The total brightness is unchanged.
i) Bulb #1 is unaffected but #3 gets brighter. The total brightness is decreased.
j) None of the above.