Friday December 17

On Friday we received new notes on Circuits;
-Transparency 32: Circuits and Circuit Diagrams
-Transparency 33: Series Circuit/Parallel Circuit
-Study Guide 23: Simple Circuits

We also watched some videos on Parallel and Series Circuits as well as a demonstration
Here is a video similar to the demonstration we had:
http://freecircuitdiagram.com/2010/04/04/electricity-series-parallel-circuits-video-tutorial/

We also got our Electric and Magnetic Field tests back. Remember to do your corrections and hand them back in to Ms. Kozoriz.

December 16

Today we started the new unit by looking at Ohm's law and circuits. We also examined circuit diagrams and the symbols that can be found on them and were then assigned a worksheet called Circuit Symbols which we went over in class. A second worksheet, Resistivity Problems, was assigned. This assignment is homework if you didn't finish it in class.

Electric and Magnetic Fields

Hi Guys! today we started class with the questions given by Miss Kozoriz yesterday from the duck book.

75. d=5cm/100=0.05m
E=5.10^3 N/C
V=E.d=2.5.10^2 V

76.
a) F=E.q=5.0.10^-4N
b) Ek=EP
EP=qV
V=Ed
V=(50)(1.0)=50V
EP=(10^-5)(50)=5.0.10^-4J
c) m=2KE/v.v=1.6.10^-12 kg

77. delta E= E2-E1=k q1q2/R2-k q1q2/R1=-2.08.10^-19 J

79.
a) q=W/V=1.8.10^-3 C
# of electrons=1.10^16 electrons
b)v2= under root qV/m=6.6.10^-23

80.
a)a=3.0.10^10 m/s. square
b)v=1.2.10^-15 J

81. R=1.9.10^-14m

82.
a)delta dh=0.00025m
b)v=6.0.10^6m/s

90.
a) Fe=Fg
Fe=mg
E=v/d
q=Fe/E
=mg/v/d
=mgd/v
=4.2.10^-19C

91.
a)v= under root 2qv/m=1.2.10^7m/s
b)v=under root 2deltaEe/3m=7.26.10^6m/s

                               As we've test tomorrow so we reviewed all the topics about Magnetic and Electric Fields. We have test tomorrow on Electric and Magnetic Fields so be prepared and good luck

Magnetic and Electric Field

Hey Classmates!
                          Yesterday we went over the Chapter 27 Review worksheet and the answers are given below:
1. 1.4.10^-4 m
2. 1.7.10^6 m/s
5. 2.63.10^6 m
6.a) 4.3.10^6 m/s
b) 1290 N/C
7. 1.92.10^-25 kg
8. 15m
         We don't need to solve question 3, 4, 9 and 10. Miss Kozoriz gave us back our DARK MATTER and Chapter 21 Lab Worksheet. Then we read Cathode ray tube from duck book page#571 upto end of the chapter and solved questions 75, 76, 77, 79, 80, 81, 82, 90, and 91. Miss Kozoriz also announced that our test on MAGNETIC AND ELECTRIC FIELD will be on Wednesday.

Electric and Magnetic Fields

Hey Classmates we started from "Moving Charges Worksheet" 

and we went over problem 8 to 11 in the class.

8.v=2.1 . 10^5 m/s

   f=5.6 . 10^-13 N

   B=f/qv

   B=5.6 . 10^-13/(1.6 . 10^-19)(2.1 . 10^5)

   B=16.6T[left]

9.v=8.6 . 10^4m/s

    B=1.2T

    F=?

    F=Bqv

    F=(1.2 )(1.6 . 10^-19)(8.6 . 10^)

    F=1.7 . 10^-14N[E] 

10.v=5.0 . 10^5m/s

     F=4.0 . 10^-6N

     B=F/qv

     B=4.0 . 10^-6/(1.6 . 10^-19)(5.0 . 10^5)

     B=5. . 10^7T [out of the page]

11.v=2.0 . 10^6m/s

    B=5.0 . 10^-2T

    F=4.8 . 10^-14N

    q=?

    q=F/Bv

    q=4.0 . 10^-14/(5.0 . 10^-2)(2.0 . 10^6)

    q=4.8 . 10^-19C

Miss Kozoriz explain a bit The Mass of an Electron, we read the Green book from page 536-541 for some basic formulas.

We got home work for the Worksheet "Moving Charges" for problems 12-16 and Review Chapter 27. And we have test on Tuesday. Have a nice weekend and prepare for the test.

Magnetic Fields, B

HEY GUYS !

For today in class, first up, Ms. Kozoriz start the class off with a short video clip on Milikan's Oil Drop Experiment.

Then we went over the first 4 questions of the worksheet handed out yesterday, called MOVING CHARGES WORKSHEET. [Please see Amy's previous post for the scans if needed!]

The answers are:

After going over the 4 questions of the worksheet, we watched some few more video clips on magnetic fields, magnetism, magnets and 3 videos for each of the right hand rules.

We then received a worksheet called The Path of a Charged Particle in a Magnetic Field. We were given some time to work on it class, and went over it together after.

Last but not least, we were asked to do questions 8-11 on the Moving Charges Worksheet for tomorrow and we will be going over those questions in class !

Thanks for reading and have a good night ! (:

Wednesday, December 8, 2010

Hi hi guys! I am back with another scribe post for today. In class today, we first went over the two worksheets that were handed out on Monday called "Electric Potential" and "Physics 40S Electric and Magnetic Fields Assignment." Please click on the picture to see what the worksheets look like if you've missed it. You can ask Ms. Kozoriz for a copy if you didn't get one. If you want to see the steps on how to solve the problem, please come see me :). Otherwise, here are the answers for the worksheets if you can't read my writing:

Electric Potential

1.) 31 J/C (electric potential)

2.) a.) 3.6 x 10^-14 J (potential energy)

b.) 180 J/C (electric potential)

3.) 20,000,000 m/s (velocity)

4.) 3.0 x 10^-4 J (work)

5.) a.) 12 ev (work)

b.) 1.92 x 10^-18J ; 12 ev (energy)

c.) 2.05 x 10^6 m/s (speed)

Physics 40S Electric and Magnetic Fields Assignment

Part 1

Part 2

1.) a.) 3.2 x 10^-15 J (potential energy)

b.) 3.2 x 10^-15 J (kinetic energy)

c.) 8.38 x 10^7 m/s (velocity)

d.) 2.4 x 10^-10 s (time)

e.) 500,000 N/C (electric field)

f.) 8.78 x 10^16 m/s^2 (acceleration)

g.) 2.1 x 10^7 m/s (velocity)

h.) 2.5 x 10^-3 (displacement)

If you have any questions about the answers please come see me :).

Next in class, we were given 3 handouts. The handouts are "Moving Charges Worksheet," "Magnetic Formulae," and a cathode ray diagram that we previously got on Monday. Please click on the pictures to view the handouts.

Moving Charges Worksheet

Part 1

Part 2

Magnetic Formulae

Cathode Ray Diagram

It will be most likely that we will be correcting "Moving Charges Worksheet" tomorrow in class so for those who were in class please have it done and for the absentees, please see Ms. Kozoriz to get a copy.

Basically in today's class, we spent our time correcting the worksheets and were to work on the new ones that were handed out. New material was not taught in today's class so nothing important was missed. If you have any questions, please see Ms. Kozoriz or myself and we will be glad to help you.

Thanks for reading my post :)!

-Amy