Comments 4 (June 27,8)

You are working on quiz 4 and have exam1 coming up. 

Continue working on ch. 19 problems, Electric fields. 

Should be reading ch. 20 (Well into)

Ch. 20 Suggested problems are 1,6,11,12,17,20,21,23,25,28,34,38,40,46,53,56

When you are ready to work ahead on reading and ch. 21 problems...here they are: 
Ch. 21 suggested problems:  1,2,4,9, 12,15,20,24,27,30, 36, 49, 51, 56, 57, 63, 65.  SECOND EDITION

There is a lot of material in ch. 21...so we will take our time on it.  

 
Electric Potential (dipole):   View, read, discuss this picture of the potential for a separated + and - charge (dipole).


EXAM COMMENTS:
 

The exam format.  The exam will be given during the first 75 minutes of Class on Monday (July 2)     You will have 75 minutes.    THE EXAM WILL START PROMPTLY... THAT MEANS PAPER AND EQUATION SHEETS WILL BE PASSED OUT BEFORE THAT TIME (to give you as much time as possible).  

The exam works as follows.  There are two parts to the exam.  Questions 1-5 are either short answer or multiple choice.  These are usually one or two brief steps or calculations.   They are 5 points each and should not require lots of space to work out solutions.   You have room to work on these and answer on the exam pages. 

Questions 6-9 are multipart questions (a,b,c,d,e.....).  YOU MUST SELECT TO DO (HAND IN) ONLY THREE OF THE PROBLEMS 6,7,8  AND 9. EACH PART OF THE PROBLEMS YOU SELECT MUST BE DONE. The three you hand in are your choice (not mine).  YOU PICK WHICH THREE I SHOULD GRADE (I WILL GRADE THE FIRST THREE I COME TO).  For example you might select 6,7 and 9. These questions are 25 points each with credit split equally between a,b,c,d....   If you attempt all four, you still must pick which three I am to grade.  Put a big x through the one you don't want me to look at.

Each of these 25 point problems will be on its own page (slightly different format than the sample exams).  You must show your work with your answers on the page.  Below the problem write out any initial figures or work, then a) and show the work for that part and the answer.  You are given partial credit for the work you show.  That is what is graded.  DO NOT TAKE YOUR ANSWERS AND PLACE THEM SOMEWHERE DIFFICULT TO FIND OR FAR AWAY FROM THE RELATED WORK.  I MUST SEE HOW YOU GOT THE ANSWER.

Make sure you give answers as follows.   If giving a numerical answer for say electric potential, you must format it like this " V=9.00Volts" .     There is  a symbol for the quantity, an equal sign, a number, and units.  Giving such an answer to say problem 7 part b as          7b      9.00 would result in a loss of one point due to no units, and may lose a point if it is unclear that you are intending to tell me about electric potential.  SHOW YOUR WORK.

WORK IN TOP DOWN MANNER.

6a
b
c
d.....

 If there is not room on the front of the page, continue on the back of that problems page.  I will provide you with additional scratch paper.  The scratch paper should not need to be handed in, but if you need extra space to show your work then you may staple it to your test.  It will need to clearly show what problem you are working on and still follow a top down format.  (I need to be able to find the work).   I WILL NOT LOOK AT THE SCRATCH PAPER UNLESS FRONT AND BACK OF YOUR TEST PAGE IS FILLED WITH WORK FIRST.

GRADING.  You get partial credit.  1 or 2 points off each part (a,b,c,d...) if units or quantity/symbol statement are missing.  Usually 2 points are taken off for a minor algebra error.  3 points for a minor physics error on that part, 4 or more for various major physics errors or major omissions.  Carry Through:  Sometimes I require that the answer to a or b is used in parts c or d.  A correct answer all the way through will receive more credit than wrong answers.  Thus I may take a point off on part c if you have the method correct, but used the wrong numbers (this is just saying that the error made earlier merits this total reduction in score for the problem....but I spread it out).  IF YOU ARE ABLE TO DESCRIBE A PROCESS TO SOLVE PART C OR D BUT DO NOT HAVE THE ANSWERS TO A OR B .....Then by all means, describe what to do with that number that you do not have.  Write out a procedure for finding the answer.  "Use this equation with these numbers (that I do not have from a), and get a result that means......      Give me as much correct information as possible.  If a question about energy results in "the KE in part c is the same as the PE in part b" then tell me that, even if you do not have the number for part b.

Look over the sample test and solutions.

Don't leave the exam early.  Look over and check your results!