Today, we'll do some practice with Lenz's Law. The primary purpose of making the video is to be a tutorial for others to watch, so you must teach the solution in such a way that others can learn from it. In other words, you are not just proving you can use Lenz's law correctly; you are providing a guided tutorial to someone who might not understand Lenz's Law as well as you. Therefore, your solution must be correct from the perspective of the video's viewer.
Each person is assigned just one problem from "Lenz's Law Practice Numbered". The answers are provided on the worksheet in parenthesis [(cw) for clockwise, (acw) for counter- or anti-clockwise]. There is a video link provided at the top of the document if you want examples of solutions. Check the post in ✏️ Google Classroom to find your assignment. Log onto 🦜 Padlet using the link attached in ✏️ Google Classroom (should be able to click "Log in with Google" using your school wwprsd account, but manually create an account with your wwprsd email if you need to). And post your video solution. Keep your video less than 90 seconds, but that should be plenty of time; my example video you see attached to the assignment in Padlet is only 45 seconds. You don't have to show your face on the video - just talk through the problem solution and show your right hand. Remember to use the phrase: "By Lenz's Law, the induced magnetic field opposes the change in magnetic flux, so in this case..." Watch a few other peoples videos if you want or practice other problems from the document. Rewatch your video before posting to make sure that it is not backwards from the viewer's perspective. Hit Submit on this assignment in ✏️ Google Classroom. That's it for the assignment!
Once you're done with the padlet, you'll practice Lenz's Law by doing some problem solving.
Homework: Lenz's Law assignment due in 🦜 Padlet by Thursday, May 7th at 10pm.
Today, we'll introduce the quantitative formula for flux in a uniform magnetic field: ΦB = BAcosθ. We'll see how we can quantify the current created by a changing magnetic flux in a loop by looking at Faraday's Law: ε = -N ΔΦB/Δt where I = ε/R (Ohm's Law).
First watch the "Faraday's Law" video.
Then, we'll practice induction problems by doing Faraday's Law problem solving.
Homework: work on the problem solving that has been previously shared.
Optional Extra Practice: 📖 Mastering Physics "Ch 25 - Faraday's Law" problems: #C9, C12, C16, MC27, 9, 14, 16,17, 20, 21, 23.
Today we'll spend more time practicing Faraday's Law problems.