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184_projects:lightbulbs_r_us_24 [2024/02/05 20:41] – dmcpadden | 184_projects:lightbulbs_r_us_24 [2024/02/10 20:01] – [Wrap Up Questions] tdeyoung | ||
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==== Kick Off Questions ==== | ==== 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), and the units: electron mobility, electron density, conductivity, | + | |
- | - Thinking about an incandescent lightbulb - what is a filament? How does this type of lightbulb produce light? (Feel free to look it up!) | + | - 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 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 ==== | ==== Main Problem ==== | ||
{{ 184_notes: | {{ 184_notes: | ||
- | Your team is continuing to help repair FTOE' | + | Your team is continuing to help repair FTOE' |
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). | 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). | ||
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==== Wrap Up Questions ==== | ==== 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?) | - 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? | - 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? |