GAVS Physics AB Course Resources
Module 10: Electricity and Magnetism
Instructor Information
Email: Emily.Kroutil@gavirtualschool.org
Phone: 470-238-8663 (voicemail)
ASSIGNMENT RESOURCES AND TIPS
LAB: Electrostatics and Electric Field Lines
- The lab handout can be found on page 3 of the content.
- You can view the lab rubric in the lab's dropbox folder. Following the rubric is the BEST WAY to make sure that you earn full points on your lab.
- I walk you through the lab in this video: https://youtu.be/W7gzD46RQMA
Q: I'm having trouble getting the site to work. What should I do?
A: If your computer has issues with accessing the Phet activities you MUST get this straightened out in order to submit the work, and these labs are required with no alternative assignments available. Unfortunately, this is not something that I am able to help with, but a problem that you will need to find a solution to. If you wait until the day the assignment is due to try to access the site and you have problems, you will not be able to get the assignment submitted on time, so it is important that you access this site ahead of time so that you'll either know you don't have problems, or you will have time to get the problems fixed before the assignment is due. Being able to access this site and the activities there is a requirement of the course and it is your responsibility to make sure that you have access. This the help site for Phet: https://phet.colorado.edu/en/help-center/running-sims. This is a blog post that a parent shared with me. The information here enabled her son to solve his computer's problems: https://blogs.windows.com/msedgedev/2016/12/14/edge-flash-click-run/
DISCUSSION: Do Electric Cars Prevent Pollution?
- Make sure you answer ALL questions in the prompt AND respond to two classmates.
- You will only earn a maximum of 70% if you do not thoughtfully respond to two classmates.
QUIZ: Coulomb's Law and Electric Potential Energy
- Make sure you do the practice problems before you take the quiz. The charge and coulomb's law practice problems and solutions can be found on page 3 of the content. The electric potential energy practice problems and solutions can be found on page 4 of the content.
- If the quiz has a short answer problem that makes you do math, you MUST show your work in order to earn full credit.
- Question: For the practice problems on page 4 of the module, what is going on with the signs?
- Answer: This site explains the following rules for the formula used in practice problem 1A-D: 1) a positive charge moving in the opposite direction of the field = +PE 2) a positive charge moving in the same direction as the field = -PE 3) a negative charge moving in the opposite direction as the field = -PE 4) a negative charge moving in the same direction as the field = +PE It looks like for part A, the electron is moving in the same direction as the field, so the PE is positive. So, they should have written deltaPE = -(-1.602E-19)(35300)(2), but instead they dropped the negatives entirely, which is confusing.
In part B, it looks like the object is positive, but is moving in the direction of the field, so the answer should be negative, and the negative should have never been dropped.
In part C, they should have written: 0.0558 = -(-7.33E-6)(92100)(d). This would give you a positive PE and the direction should say 0.0827 m in the same direction as the field.
In part D, they should have written 5.20 = -(q)(318)(0.00785). This will give you a negative value for q, which agrees with the fact that the PE is positive, because electrons moving in the same direction of the field, should have a positive PE.
Question: Is there reason that the negative was dropped from V= -Ed in Practice Problem 3?
Answer: Basically, potential difference is a scalar quantity, so it doesn't need a negative. The negative is often put in the formula as a holdover from calculus.
This article might explain it a little better: http://phys101.blogspot.com/2006/01/question-evd-or-v-ed-to-minus-or-not.html and https://sites.google.com/site/p3t3rl12/-EDphys102.jpg
The teacher that wrote the course primarily teaches AP Physics with Calculus, so he might just be used to writing it this way, even though it is confusing.
LAB: Circuits Virtual Lab
- The lab handout can be found on page 5 of the content.
- You can view the lab rubric in the lab's dropbox folder. Following the rubric is the BEST WAY to make sure that you earn full points on your lab.
- If the lab has a short answer problem that makes you do math, you MUST show your work in order to earn full credit.
- I walk you through the lab here: https://youtu.be/X9NheOCiWnE
Q: I'm having trouble getting the site to work. What should I do?
A: If your computer has issues with accessing the Phet activities you MUST get this straightened out in order to submit the work, and these labs are required with no alternative assignments available. Unfortunately, this is not something that I am able to help with, but a problem that you will need to find a solution to. If you wait until the day the assignment is due to try to access the site and you have problems, you will not be able to get the assignment submitted on time, so it is important that you access this site ahead of time so that you'll either know you don't have problems, or you will have time to get the problems fixed before the assignment is due. Being able to access this site and the activities there is a requirement of the course and it is your responsibility to make sure that you have access. This the help site for Phet: https://phet.colorado.edu/en/help-center/running-sims. This is a blog post that a parent shared with me. The information here enabled her son to solve his computer's problems: https://blogs.windows.com/msedgedev/2016/12/14/edge-flash-click-run/
QUIZ: Circuits and Magnets
- Make sure you do the practice problems before you take the quiz. The Ohm's law and circuits practice problems and solutions can be found on page 5 of the content. The magnetism and induction practice problems and solutions can be found on page 6 of the content.
- If the quiz has a short answer problem that makes you do math, you MUST show your work in order to earn full credit.
- Question: I'm having trouble with the right hand rule...are there any extra resources available to help me understand it?
- Answer: Try this site from Khan Academy. It does a great job explaining the right hand rule.
TEST: Electricity and Magnetism
- A great way to study for the test is to go back and look at the quiz questions you missed.
- If the test has a short answer problem that makes you do math, you MUST show your work in order to earn full credit. What does showing your work look like? Read this!
- After you finish your test, be sure to review what you missed, and look for the News announcement outlining test correction procedures.
- I reviewed for this test here: https://youtu.be/se84vJopY0M