Monday, March 11, 2013
AP PHYSICS Electorstatics
Objectives
Please Start reading electrostatics
After studying the material of this chapter, the student should be able to:
1. State from memory the magnitude and sign of the charge on an electron and proton and also state the mass of each particle.
2. Apply Coulomb's law to determine the magnitude of the electrical force between point charges separated by a distance r and state whether the force will be one of attraction or repulsion.
3. State from memory the law of conservation of charge.
4. Distinguish between an insulator, a conductor, and a semi conductor and give examples of each.
5. Explain the concept of electric field and determine the resultant electric field at a point some distance from two or more point charges.
6. Determine the magnitude and direction of the electric force on a charged particle placed in an electric field.
7. Sketch the electric field pattern in the region between charged objects.
8. Use Gauss's law to determine the magnitude of the electric field in problems where static electric charge is distributed on a surface which is simple and symmetrical.
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I hope everything's okay!!
ReplyDeleteThanks. I will be in AsAp. I appreciate your concern.
DeleteWhat chapter in the book is this exactly?
ReplyDeleteElectrostatics? Ch.18
ReplyDeleteOk thank you. Also I have not been able to get those videos posted above to play for me
ReplyDeleteThe videos above are macro media flash videos. You need to access the. From a brower on a Oc. They have not been tested on a Mac but most likely will gl have issues on safari.
ReplyDeleteOk thank you mr. Crane
ReplyDeleteIs anyone else having problems playing the examples on their PC?
ReplyDeleteTHe examples are running on adobe shockwave player so make sure your browser is running the latest version... I am using firefox to view as well I hope this helps please post if you continue to have issues.
DeleteI downloaded the latest version of adobe shockwave player and it's still not working. An error message keeps popping up. I'll keep trying. But thanks anyway!
DeleteSame, I can't get them to play on my PC or desktop... did the adobe download help?
DeleteOk thanks for trying... I will post a different link for a lab but the Pencast notes pretty much do the same thing but are not interactive. Please mention to the class that there are individuals not blogging and it os part of your grade. I would post it but they would have to use the blog to read it.
ReplyDeleteokay, sounds good...and I'll mention it!
DeleteIf one of our questions is unanswered, can we ask a different physicist a question?
ReplyDeleteHas anybody started the Ch18 Classwork (problemset) ?? I'm having a tough time getting past the beginning questions.
ReplyDeleteThese are basically factor label. You are converting between electrons and coulombs. The conversion was given on the Pencast, also the notes in class . If all else fails the book has worked out examples.
DeleteThank you!
DeleteI'm having some trouble too... Caity, I used N=q/e from the book.
ReplyDeleteif I take +5 and touch it to -5, Hwat would the resulting charge be? ANS:0
ReplyDeleteSo if I take +8 and -3 and do the same thing?
Ans=+5
If that were +5 Coulombs you need to convert that to electrons or vice versa.
1e=1.6X10^-19 Coulombs
ex.
1quart=.25 gallons
if you have 5 gallons that would be how many quarts?
Factor Label it
5Galx 1Quart =20 Quarts
.25 Gal
If you posted to the blog with questions prior to now you get an extension for the CH.18 problem set until the end of the week.
ReplyDeleteThank you
DeleteSo does that mean the questions are due tomorrow for the rest of us then? beside the first few I am having much difficulty as the questions go on to different sections.
DeleteWhen it says short answers, are we just writing the answer down or is there anything else we have to add in addition to it?
ReplyDeleteFor problem 12, if the equation for electrostatic force has the absolute value of q1 and q2, how can you give the direction? It will always be a positive force, right?
ReplyDeleteFor 26 how do we raw the solution in the box...should we just skip that one?
ReplyDeleteI just skipped it on the online thing and drew it out on a paper.
DeleteAre you guys showing your work for the short answer problems? I feel like it would be hard to show work since we don't have the symbols or anything.
ReplyDeleteCleo- I drew some pictures, so I'm just going to write see attached.
ReplyDeleteAlso, does anyone have a good method for solving 42 or 52?
For 42(64 in textbook) I figured that, for each of the four charges, you would apply Coulomb's Law to the remaining 3 then add them up and compare the largest and the smallest.
DeleteCrane i blogged so could i get those blog points
ReplyDeleteZach Makki
Are we going over the Ch.18 problems in class? I submitted them on Tuesday but I couldn't solve a couple of problems.
ReplyDelete-- Aleena
DeleteI wasn't sure where to post this but since I've been home sick I wasn't able to go over my "Field of Dreams" lab results with anyone. Morgan and I compared our electric field to one of a parallel plate capacitor which means the field lines are perpendicular to the plates because our equipotential lines are paralell to the plates. How does voltage factor into this or is it independent of the electric field?
ReplyDelete-Kennedy Stafford