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What are the connections between the electrostatics concepts?

posted Apr 12, 2019, 7:15 AM by Barbara Fortunato

2: T 4/16, 5: W 4/17, 7: W 4/17 (all shortened periods for NJ-SLA testing)

Last day to work on finalizing your electrostatics project with your partner.

Homework:  Project due to Google Classroom by Wednesday, April 17th at 11:59pm.

How well do you understand electric potential?

posted Apr 12, 2019, 7:13 AM by Barbara Fortunato

2: M 4/15, 5: M 4/15, 7: M 4/15

QUIZ Today on electric potential energy and potential!

After the quiz, you'll have another opportunity to work with your partner on the project due Wednesday.

Homework:  Project due Wednesday!

How can we organize our thoughts around electrostatics?

posted Apr 7, 2019, 6:40 PM by Barbara Fortunato   [ updated Apr 12, 2019, 7:07 AM by Barbara Fortunato ]

2: F 4/12, 5: Th 4/11, 7: F 4/12 (JProm)

We've seen a lot of new and difficult concepts this unit, so we'll start class today by trying to figure out how all these concepts relate to each other. We'll fill out a graphic organizer which will help us to organize the way we think about each concept. In pairs, you will then create your own original thinking map - see more details on Google Classroom - due Wednesday, April 17th.  This will be a great tool for your studying.  You will not be able to use these graphic organizers or thinking maps on the test, but use it to organize your thoughts!
 
Then, with any time remaining, we'll start looking at a series of problems which will test your understanding of electrostatics concepts. 

HomeworkStudy for QUIZ next class - Monday, April 15th on electric potential energy and potential.   Look over your Electrostatics Information graphic organizer to make sure you understand all of the concepts.  Unit test on electrostatics scheduled for Friday, May 3rd.  

How do you do problems with electric potential?

posted Apr 7, 2019, 6:36 PM by Barbara Fortunato   [ updated Apr 7, 2019, 6:42 PM ]

2: W 4/10, 5: W 4/10, 7: Th 4/11

Today, we'll continue to solve problems with electric potential.  

Then, we'll work on electric potential energy quiz corrections.  
 
Presentation:  Electric Potential
Homework Tonight, finish all of the problems in the Electric Potential presentation.   If you've already finished, then do a few extra practice problems from section 16.1.  

What is electric potential?

posted Apr 7, 2019, 6:29 PM by Barbara Fortunato   [ updated Apr 7, 2019, 6:35 PM ]

2: T 4/9, 5: T 4/9, 7: T 4/9

QUIZ Today on electric potential energy.

Today, we'll continue our discussion about electric potential energy and learn about electric potential.  This will be done through interactive lecture and by trying a few example problems. 
 
Presentation:  Electric Potential
Homework:  Look over your notes on electric potential and try to make sense of it.  If you have any trouble with the concepts from today, check out this video:

Potential, Potential Difference, & Voltage (lasseviren1)


For a little more detail using the concept of equipotential lines (which is somewhat helpful for visualization), check out this video:

Electric Potential (duffydoesphysics)

Electric Potential Energy Difference (Khan Academy)

How well can you do problems with electric potential energy?

posted Apr 7, 2019, 6:26 PM by Barbara Fortunato

2: M 4/8, 5: F 4/5, 7: M 4/8

Today, we'll make sure you have a good understanding of the electric potential energy problems from the previous post.  We'll then do quiz corrections on the Electric Field and Force Quiz and the Electroscope Lab Quiz.  With any time remaining, you'll practice textbook problems from Section 16.1.  (See Google Classroom.)

HomeworkStudy for QUIZ next class Tuesday, April 9th on electric potential energy.

How do we calculate electric potential energy?

posted Apr 7, 2019, 6:20 PM by Barbara Fortunato   [ updated Apr 7, 2019, 6:33 PM ]

2: Th 4/4, 5: Th 4/4, 7: F 4/5

Today, we’ll learn how to solve electric potential energy problems from the textbook #12, 10, 15, and 14a.  Remember that electric potential energy is a scalar quantity.  

Presentation:  Electric Potential Energy Problems
Homework:  Check your understanding by finishing the problems in Electric Potential Energy Problems PowerPoint.  Watch the following video to help you to understand #15:

Electric Potential Energy Triangle (C. Vandrevala)


Is there energy associated with electricity?

posted Mar 29, 2019, 11:47 AM by Barbara Fortunato   [ updated Apr 7, 2019, 6:21 PM ]

2: W 4/3, 5: W 4/3, 7: W 4/3

QUIZ on electric field and force TODAY!

Today, we’ll learn about electric potential energy.  We’ll compare electric potential energy to gravitational potential energy.  

Homework:  We went over section 16.1 from the textbook today in class.  If you have any trouble with the concepts from today, watch just the first 3 minutes of the video below by Mrs. Twu.  The final equation is UE = k qs qo / r.  This formula gives us the potential energy of a point charge with respect to infinity (meaning that infinitely far away from the source charge is our UE =0 location).  If you want even more background, watch the second video by Khan Academy (optional but may be helpful in understanding concepts more.  I know that this video involves calculus, and if you're in precalc, don't panic.  Just relax and try to understand the concepts.  Don't worry about performing the integral.  Just focus on the ideas.)  

Electric Potential Energy (Mrs. Twu)

Electric Potential Energy Difference (Khan Academy)


How do we know what electric field lines look like?

posted Mar 29, 2019, 11:12 AM by Barbara Fortunato   [ updated Apr 1, 2019, 6:12 PM ]

2: T 4/2, 5: M 4/1, 7: T 4/2

Period 7 - We'll be in the library computer lab for this class, as I will be simultaneously proctoring a physics contest in the library conference room.  Please go directly to the library for this class.

Today, we'll discover what a field is by looking a gravitational fields with which we are a little bit familiar. We'll discuss what an electric field looks like and how to represent it with electric field lines. Finally, you'll try to figure out in your lab groups what an electric field looks like around various configurations of charges by using the simulation found at https://phet.colorado.edu/sims/html/charges-and-fields/latest/charges-and-fields_en.html.  This page from the textbooks may help you to understand how to make your predictions: Constructing Electric Field Pattern Due to a Dipole.

Watch directions for this activity here (sorry for the low res, but you'll get the idea):

Directions to "May the field be with you"


Homework Finish "May the FIELD be with you" - try to answer the questions as best as you can!  Also, read the five general rules for electric field lines on the bottom of page 543 of your textbook (also copied below). Study for QUIZ electric field and force next class - on Wednesday, April 3rd.  The quiz will include problems like from  FYP: Coulomb's Law.  

The general rules for sketching and interpreting electric field lines are as follows:
  1. The closer together the field lines, the stronger the electric field.
  2. At any point, the direction of the electric field is tangent to the field lines.
  3. The electric field lines start at positive charges and end at negative charges.
  4. The number of lines leaving or entering a charge is proportional to the magnitude of the charge.  (See Learn by Drawing 15.2, Sketching Electric Lines of Force for Various Point Charges.)
  5. Electric field lines never cross.

How do you solve problems with electric fields?

posted Mar 24, 2019, 4:47 PM by Barbara Fortunato   [ updated Apr 3, 2019, 4:50 AM ]

2: F 3/29, 5: F 3/29, 7: M 4/1

Today, we'll do some sample problems using the concept of electric fields.  Then with the time remaining, we'll do any outstanding test and quiz corrections.
 
PresentationElectric Fields
Homework Make sure you have finished FYP: Coulomb's Law #10-15 if you were not able to complete it last time.  For #14-15, try to use the principle of superposition to find the net electric field.  We'll go over this in greater detail next class.  For extra practice (optional) try Electrostatics Hewitt Packet pages 5-7.

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