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--- 184_projects:lightbulbs_r_us_24 [2024/02/09 21:22] – tdeyoung
+++ 184_projects:lightbulbs_r_us_24 [2024/02/14 15:10] (current) – tdeyoung
@@ Line 9: / Line 9: @@
 {{  184_notes:wires.png?200}}
-Your team is continuing to help repair FTOE's Hawkion accelerator.  The accelerator engineers want warning lights so that they know the when the power delivery system is operating, and they have told you that a current of 2.5 A down the carrier wire should turn on the warning light.  But with Lakeview still sealed off by rogue thunderstorms they can't order LED bulbs and will need to construct lightbulbs the old-fashioned way using a filament (very thin piece of wire, diameter = 0.1 mm) connected to the carrier wire (normal electrical wire, diameter = 1.63 mm). You happen to have the following [[184_notes:metals|metals in the warehouse]], with known electron densities and electron mobilities.
+Your team is continuing to help repair FTOE's Hawkion accelerator.  The accelerator engineers want warning lights so that they know when the power delivery system is operating, and they have told you that a current of 2.5 A down the carrier wire should turn on the warning light.  But with Lakeview still sealed off by rogue thunderstorms they can't order LED bulbs and will need to construct lightbulbs the old-fashioned way using a filament (very thin piece of wire, diameter = 0.1 mm) connected to the carrier wire (normal electrical wire, diameter = 1.63 mm). You happen to have the following [[184_notes:metals|metals in the warehouse]], with known electron densities and electron mobilities.
 The engineers have asked for a product report on your design. They would like you to outline which metals you would want to use for carrier and filament, why you picked those metals, and the expected surface charge distribution for your set up. They would also like to know the total resistance of your design and the total voltage needed to power your bulb (so they know what kind of battery to provide).
@@ Line 23: / Line 23: @@
 ==== Wrap Up Questions ====
-Conceptual Questions:
   - How does the current compare in the filament and carrier wires? (Same, bigger, smaller?) How does the electric field, potential difference, and power compare for the different wires? (Same, bigger, smaller?)
   -  What is the drift speed of the electrons in the wire? How long would it take one electron to travel the whole circuit? (You can calculate a numbers here.) Why would the lights turn on immediately when you flip a switch?