• 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).
• Please enter your solution in the text area at the bottom of this page. DON'T FORGET TO GIVE YOUR NAME!

Special Notice: partial credit will be awarded on this puzzle.

The figure shows a graph of the current in a series RLC circuit, I=I_maxcos(t). There are five points marked on the graph, labeled A, B, C, D, E. Points A, B, C, and D occur where t is a multiple of /2. At E, t is a multiple of /4. Please state at which point (or points) each of the following quantities are a maximum, a minimum, or zero:

• The energy stored in the inductor
• The voltage across the capacitor
• The power input to the capacitor
• The power output by the inductor
• The charge on the capacitor
• The voltage across the resistor

Don't forget to explain your answer as clearly as possible.

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