AT Cycle 23

🔴 2: M 1/30a, 🟡 4: F 1/27 - RC circuits problems (1)

Today, to check your understanding of the previous mystery capacitor lab, do the following problems:   
Required 1:  2007E1, 2013E2, and Chapter 27 #59 & 60. 

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.  

Homework:  Upload pictures of your solutions the four AP problems above in ✏️ Google Classroom by Monday at 10pm.  

🟥 2: M 1/30b, 🟨 4: M 1/30 - RC circuits problems (2)

Today, we'll work on a few AP problems involving RC circuits.  If you haven't finished the problems from the above post on the process of charging and discharging capacitors, finish them first:

Required 1:  2007E1, 2013E2, and Chapter 27 #59 & 60. 

Then work on the following problems.  These are learning problems, so we will be learning and deepening our understanding of capacitors while we do problems.

    Required 2:  Ch 27 #61, 63, 65, 67, 79, 80, 2006E2, 1996E2, 2010E2
    Enrichment: Ch 27 #66, 69

We will continue these problems next hour.  

Homework:  Upload pictures of your solutions the problems above (required 2) in ✏️ Google Classroom by Wednesday at 10pm.  Watch the video on Dielectrics in Capacitors below, although it should be review of what we have already talked about in class, so at least skip through it. 

❤️ 2: T 1/31, 💛 4: W 2/1a - RC circuits problems (3)

Today, continue working on the following problems.  These are learning problems, so we will be learning and deepening our understanding of capacitors while we do problems.

    Required 2:  Ch 27 #61, 63, 65, 67, 79, 80, 2006E2, 1996E2, 2010E2
    Enrichment: Ch 27 #66, 69

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 Friday at 10pm.

Homework:  Short QUIZ on RC Circuits on Friday, February 3rd.  Upload pictures of your solutions the problems above (required 2) in ✏️ Google Classroom by Wednesday at 10pm.  ✅ GoFormative "Capacitor Pre-Lab Revisited" also due on Friday at 10pm.

📕 2: W 2/1, 📒 4: W 2/1b - ✏️dielectrics

Today, we'll talk about how dielectrics can increase capacitance.  We'll look at the work to insert or remove a dielectric with a problem.  Watch the following video for details on dielectrics.  Then do problems from the Giancoli textbook Chapter 24:

   Required: Giancoli Ch 24 Example 24-8 and Problems #56, 57, 85, 87

Here's a list of the things you should be able to do by now:

• Know how to derive the charging and discharging equations (and also know what they are without doing the derivation)

• Know how to get the time constant from a graph two different ways

• Know what happens at t=0+ and t=∞  when charging or discharging

• Derive the energy stored in capacitor equation

• Know how a dielectric changes electric field, capacitance, and energy stored

• Know the two different types of problems when inserting dielectrics

• Derive the “CAKEd” equation

Homework:  Short QUIZ on RC Circuits on Friday, February 3rd.  Upload pictures of your solutions the problems above (required 3) in ✏️ Google Classroom by Sunday at 10pm. If you need to review dielectrics, you may review the video below: