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184_projects:lightbulbs_r_us_24 [2023/12/19 21:37] – created dmcpadden | 184_projects:lightbulbs_r_us_24 [2024/02/09 21:22] – tdeyoung | ||
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- | ==== Project 6A: Lightbulbs' | + | ===== Project 6A: Lightbulbs' |
+ | |||
+ | ==== Kick Off Questions ==== | ||
+ | - There are a lot of new vocab words this week. For each of these words, write out the variable, the definition (what is it in words), | ||
+ | - Thinking about an incandescent lightbulb - what is a filament? How does this type of lightbulb produce light? (Feel free to look it up!) | ||
+ | - What equation would you use to calculate the resistance of a lightbulb if you know the material, length, and area of the resistor? What equation would you use to calculate the resistance if you know the voltage and current of the light bulb? What equation would you use to calculate the resistance if you know the power and current? (Write these equations in your facts quadrant - you'll need them later!) | ||
+ | |||
+ | ==== Main Problem | ||
{{ 184_notes: | {{ 184_notes: | ||
- | Continuing T.R.O.J.A.N forces collaboration with the Jet Propulsion Laboratory (JPL) Division of NASA, you and your team are working with a group of electrical engineers at Lightbulbs'R'Us. Given the problems that Lieutenant Pete " | + | Your team is continuing to help repair FTOE's Hawkion accelerator. The accelerator engineers want warning lights |
- | JPL has 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). | + | 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). |
<WRAP info> | <WRAP info> | ||
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</ | </ | ||
+ | ==== Wrap Up Questions ==== | ||
Conceptual 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? |
- | | + | |
- 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? | - 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? | ||
- | - What assumptions did you make in your solution? Why did you need them? | + | |
- | - What other factors might influence the choice of metal? How realistic is your solution? | + | |
+ | - What materials are typically used for lightbulbs? Does this match your solution? | ||
/* | /* |