Wright State University Lake Campus/2019-9/Phy 2410/Notes

PHY2410

https://pilot.wright.edu/d2l/le/content/517109/Home

08-27T (week1) UP2-1-Charges and fields.

UP2-0-Overview UP2-1-Charges and fields. powerpoint pages 1-10

Lab

Inventory for Kits. Required Report to be done at home.

08-29R (week1)

UP2-1-Charges and fields powerpoint

09-03T (week2)

Finished UP2-1-Charges and fields powerpoint. Practice for Test Tue 10 Sep up2

Lab

Practice for test on Tues 10: https://pilot.wright.edu/d2l/le/content/517109/viewContent/2886956/View

09-05R (week2) UP2-2-Gauss Law

Start powerpoint UP2-2-Gauss Law powerpoint

09-10T (week3)

Test 1

Lab

Go over test?

Report longer than a half page.

Do assigned circuit

Make a quick circuit diagram.

Most important part: Document with greek letters.

Thursday:

Group reports encouraged.

You must do the assigned circuit, unless you choose to do no circuit.

Most of the time, you can do a report on something else.

Choices: Previous test or Area of a sphere using calculus.

• 
• 
• 
• 

These images illustrate the physics version of spherical coordinates on a globe (angular part only)]]

09-17T (week4) UP2-5-Current Resistance

• UP2-5-Current Resistance

09-24T (week5) UP2-6-Direct-Current Circuits

• UP2-6-Direct-Current Circuits

10-01T (week6) UP2-7-Magnetic forces and fields

• UP2-7-Magnetic forces and fields

10-08T (week7)

Announce test next Tuesday:

Wright State University Lake Campus/2019-9/Phy 2410#UPCOMINGTues_15_October or

https://pilot.wright.edu/d2l/home/517109

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• How much longer is the outer edge of the tape longer than the inner edge?

1. Answer without using calculus
2. Do a first order approximation (whisky-cigar w/o the cigar) and compare the answers.
3. Can you define an intrinsic variable for the bent/wrinkled tape?

Set the radius at the free-throw be nominally R= 2m and let the tape width be W=4cm. Express all your equations using the symbols (R,W) in order to app

10-10R (week7)

Lab and Recitation Hours

Algebra
Lab1 110 min Rec 55 min Lab2 110 min 110<Total<275 Note that 275/5 = 55 55-10 = 45 minutes Lets do projects and split into 5 groups Lab1 45 min (X 2 shifts) Rec 45 min Lab2 45 min (X 2 shifts) Halfway between 3:20 and 5:20 is 4:20

Two lab periods every day

3:20 - 4:20 You can come 15 minutes late or leave 15 min early.

4:20 - 5:20 You can come 15 minutes late or leave 15 min early.

Recitation group

5:30 - 6:25 You can come 10 minutes late or leave 10 min early.

We will have 5 groups

1. Early Tuesday Lab
2. Late Tuesday Lab
3. Recitation Tuesday
4. Early Thursday Lab
5. Late Late Thursday Lab

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Projects

The goal of each project is co-authorship on the Lake Campus Research Symposium

Conceptual technical writing

• Physics for beginners

Optics and manufacturing

• Upside down goggles

Radioactive decay, statistics, and computer programming

• Python and radioactity with dice.

Mathematical physics

1. Why $1+2+3+...=-{\tfrac {1}{12}}$ is useful if not true
2. Generalizing the Taylor expansion to two dimensions
3. Calculating the area of a sphere and how that eventually led to a precise definition of temperature and entropy

Creating exam questions

• Quizbank

Mechanics, music and measurement of time

• Galileo's ramp in D minor.

Gridion pendulum and properties of materials

• Wright State University Lake Campus/2019-9/Gridiron pendulum

Physics 1110 labs

1. Force table w Escel and error analysis
2. Stretching a long string
3. Others are possible

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Charge due to a slab of charge

https://www.youtube.com/watch?v=39ZZH1VjxPk

1 A cylinder of radius, R, and height H has a uniform charge density of $\rho$. The height is much less than the radius: H << R. The electric field at the center vanishes. What formula describes the electric field at a distance, z, on axis from the center if z > H/2?

	$\varepsilon _{0}E=\rho z$
	b) $\varepsilon _{0}E=H\rho$
	c) $\varepsilon _{0}E=H\rho z$
	d) none of these are correct
	e) $\varepsilon _{0}E=H\rho /2$

2 A cylinder of radius, R, and height H has a uniform charge density of $\rho$. The height is much less than the radius: H << R. The electric field at the center vanishes. What formula describes the electric field at a distance, z, on axis from the center if z < H/2?

	$\varepsilon _{0}E=H\rho /2$
	b) none of these are correct
	c) $\varepsilon _{0}E=\rho z$
	d) $\varepsilon _{0}E=H\rho$
	e) $\varepsilon _{0}E=H\rho z$

10-15T (week8)

Start lab schedule

• Unless I change my mind, you are all allowed to do this lab by doing an assigned lab and the report. The only complication is that I might not have enough "traditional" labs for you to do. I might be forced to make you do one of my projects on one or two lab sessions.

For that reason, I need a list of people who wish to do a project leading to a symposium poster.

• There is a shortage of people who want to do the Thursday late lab (4:25-5:20) due to a difficult class that follows. We will devote that time-slot to a project related to materials, and set aside time for study if you have an exam just after the test.
• I have two "engineering projects":

1. Upside down goggles
2. Gridiron pendulum: wikipedia:Gridiron pendulum and also Lake Campus Gridiron page

• My most exciting project is essentially a this technical writing problem. If this is successful (and it probably won't be), you could be a co-author on a refereed journal article.

10-17R (week8) up-?=Electromagnetic induction

• Electromagnetic induction

10-22T (week9) Test

Tues 22 October covers an old practice test:

• https://pilot.wright.edu/d2l/le/content/517109/viewContent/2886956/View

10-24R (week9)

Field theory summary

w:Gravitational_acceleration

w:Electrostatics

w:Magnetostatics and w:Magnetic_field

10-31R (week10)

1. https://phet.colorado.edu/sims/html/charges-and-fields/latest/charges-and-fields_en.html
2. https://www.falstad.com/emstatic/ Two dimensional
3. https://web.iit.edu/sites/web/files/departments/academic-affairs/academic-resource-center/pdfs/Amperes_law.pdf

11-05T (week11)

We will do 7 problems from File:Quizbankqb d cp2.12.pdf

• ${\vec {B}}=\oint {\frac {\mu _{0}}{4\pi }}{\frac {Id{\vec {\ell }}\times {\hat {r}}}{|r|^{2}}}$ and the volume integral $\int {\frac {\mu _{0}}{4\pi }}{\frac {{\vec {J}}\times {\hat {r}}}{|r|^{2}}}d\tau '$, where ${\vec {J}}$ is current density.
• $\oint {\vec {B}}\cdot d{\vec {\ell }}=\mu _{0}I_{encl}$ is Ampere's law relating a closed integral involving magnetic field to the total current enclosed by that path.