AT Cycle 23
1/23 - 2/3
🔴 1: F 1/28, 🟡 3: F 1/28 - mystery capacitor lab (2)
QUIZ Today on derivation of charging and discharging equations (marking period 3).
Today, we'll try to finish the Mystery Capacitor Lab. Pages 1 and 2 should already be complete, and you just need to build the circuits and find the values of the mystery capacitor and resistor.
Have the teacher check your circuit before connecting the power supply.
Be mindful of the polarity of the electrolytic capacitor. The notch is on the positive end.
Make sure all the knobs on the power supply are turned all the way counterclockwise before plugging in the power supply.
Be sure to NOT touch any of the exposed wires in your circuit while you are running your experiment.
Discharge your capacitor shortly after charging it to reduce the amount of time where you have a large amount of charge on your capacitor and to leave for adequate time for full discharge. In general, minimize the time that you have an active circuit.
Make sure to discharge your capacitor fully before dismantling your circuit.
At the end of the lab, unplug your power supply and place the plug on top of the power supply so I can see from across the room that it is unplugged.
Then we'll do one problem to check for understanding.
Handout: Mystery Capacitor Lab
Homework: Watch this video on energy stored in a capacitor:
🟥 1: W 2/2 lab, 🟨 3: M 1/31 lab - RC circuits problems (1)
If you haven't finished the Mystery Capacitor Lab, start with that.
Then, rather than focusing on how capacitors charge and discharge over time, we'll think about what happens immediately after the switch is closed and a long time after the switch is closed. For additional support, watch the following 3 videos.
Remember that an uncharged capacitor acts like a wire and a fully charged capacitor acts like an open circuit. Then think about using Kirchhoff's Loop Rule to solve the rest.
Then, we'll work on a few AP problems involving RC circuits. These are learning problems, so we will be learning and deepening our understanding of capacitors while we do problems.
We will continue these problems next hour.
Homework: Upload pictures of your solutions the four AP problems above in ✏️ Google Classroom by Friday at 10pm.
❤️ 1: Th 2/3, 💛 3: W 2/2 - RC circuits problems (2)
Today, we'll work on a few AP problems involving RC circuits. These are learning problems, so we will be learning and deepening our understanding of capacitors while we do problems.
Also, after learning a little more, I would like for you to revisit the "Tricky Challenge" from the ✅ GoFormative "Capacitor Pre-Lab". There's a new assignment in ✅ GoFormative called "Capacitor Pre-Lab Revisited" which is also due on Sunday at 10pm.
Homework: Upload pictures of your solutions the four AP problems above in ✏️ Google Classroom by Friday at 10pm. ✅ GoFormative "Capacitor Pre-Lab Revisited" also due on Sunday at 10pm.