|Office||SSC 208, desk next to computer|
|email@example.com (primary) OR firstname.lastname@example.org (bkp)|
|HomePage||This page! (http://www.sethi.org/lab135b/)|
|Location of Lab||Kaprielian (KAP) Basement (welcome to the dungeon!)|
|Office Hours||T 12-2 p.m. in SGM 412|
Following are the times I will definitely be unavailable during the semester. The open slots are potentially free times so if you'd like to setup an appointment at a time other than my official OH, please use this as a guide (however, please keep in mind that poor grad students, just like ordinary folk, have classes, girlfriends, and beer all vying for our free time, such as it is... so just because it appears open doesn't necessarily mean it's actually free).
One night when his charge was pretty high, Micro Henry decided to try to get a cute little coil to let him discharge. He picked up Millie Amp and took her for a ride on his Mega cycle. They rode across the Wheatstone bridge, around by the sine wave, and stopped in a magnetic field by a flowing current.
Micro Henry, attracted by Millie's characteristic curves, soon had her resistance at a minimum and his field was fully excited. He laid her on the ground potential, raised her frequency, lowered her capacitance and pulled out his high voltage probe. He inserted his probe into her test socket, connected them in parallel, and began to short circuit her shunt.
Fully excited Millie Amp exclaimed, "Mho, mho, mho." With his tube operating at its maximum peak current and her coil vibrating from the current flow, she soon reached her maximum peak potential. The excess current flow had gotten her coil hot and Micro Henry started rapidly discharging and soon had drained off every last electron.
They fluxed all night trying various connections and sockets, until Micro Henry's bar magnet had lost all of it's field strength. Afterwards, Millie Amp tried self induction and damaged her solenoid. With his batteries fully discharged, Micro Henry was unable to further excite his generator, so they ended it all by reversing polarity and blowing each other's fuses.
The teaching experience: TA: What went on in this lab? Student: What do you mean? TA: What did you do in this lab? Student: Lab 3. TA: And what did you do in lab 3? Student: We measured the result. TA: Assume I've never seen this lab before, and you're going to explain it to me. What would you say? Student: (pause) Well, it was all about getting the slope. TA: The slope of what? Student: The slope of the plot. TA: I know that, but you have to assume I've never heard of this lab, ok? How would you explain what you did? Student: We got the wires and measured at each point. TA: Measured what? Student: What the meter said. TA: (pause) Look. Your report tells me nothing; this could be an experiment about baking cakes. What's this number here? Student: 5. TA: Yes I KNOW it's 5. What did it measure? Student: The slope. Of the line. TA: What line? Student: The line. On the plot. We measured the points and plotted them. TA: Why? Student: (knowing smile) Because that's what the lab said. TA: If I was a total stranger, how would you explain this to me? Student: You just connect it up-- TA: Connect WHAT up? Student: The circuit. TA: Why? Student: I'm sorry, I don't know what you're asking. TA: I'm asking: what is this lab all about? Student: Well, we put in the wires and got 5. TA: 5 what? Student: The slope. TA: WHAT was it slope? Student: 5. TA: I KNOW that, but what was it a measurement of? Student: The meter. TA: (sigh) One more time -- consider me a total stranger. How would you explain this to me? Student: You just put on the wires and vary the dial until you get the readings. TA: What dial? Student: On the power supply. TA: Why was there a power supply? Student: Well, for the circuit. TA: And what readings are you talking about? Student: The readings in the plot. TA: They gave you a plot in the lab manual? Student: I'm sorry, I don't know what you're asking. TA: Where did the plot come from? Student: We drew it. TA: From what? Student: From the experiment. TA: The experiment about what? Student: About lab 3. TA: (expires)