AT Cycle 20

🔴❗ 1: F 1/8, 🟡❗ 3: F 1/8a Kirchhoff's Laws

Quiz today on electrostatics including potential energy and potential.

Today, after the quiz, we'll review Kirchhoff's Loop Rule and Junction Rule by doing an example problem. Although you may have already learned about the technique of using "equivalent resistance," this technique does not work well if we have more than one battery. Kirchhoff's Laws are a much more general technique for solving any circuit. We will be using this technique throughout this unit, so make sure you write down any questions you have and find the answers since it's very important you are an expert in using Kirchhoff's Laws. Pay special attention to sign conventions. Rewatch videos from last post if you need to.

Homework: Remember ➕ Positive Physics unit 20: circuit analysis "challenge 2" (4 problems) due Sunday at 10pm. Only completion score counts, so try the problems till you get them right. No late work will be accepted.

🟥 1: M 1/11, 🟨 3: F 1/8b Kirchhoff's Laws & capacitor intro

Today, you'll practice Kirchhoff's Laws (loop rule and junction rule) by doing Kirchoff's Laws Intro HW. We'll also start to talk about capacitors.

Homework: Finish Kirchoff's Laws Intro HW due in ✏️ Google Classroom Tuesday. Also watch the following videos on Capacitors:

❤️ 1: T* 1/12a, 💛 3: T* 1/12 time-dependent RC circuits

Today, we'll learn what a capacitor does when it's in a circuit. This PhET simulation will assist with our investigation. We will compare and contrast a capacitor with a battery. Then, we'll use Kirchhoff's Laws to determine an expression for the charge of a capacitor as time changes.

📕 1: T* 1/12b, 📒 3: W 1/13 charging & discharging equations

Today, we will collaborate to understand Jon Ting's video by forming heterogeneous groups/pairs to ensure everyone understood the derivation.

Homework: Read sections 27-3 & 27-4 in your textbook. Rewatch Jon Ting's video below. Quiz next class on resistor circuits and Kirchhoff's Laws.