Wright State University Lake Campus/2018-9/Phy2410/Notes
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blog (more) Journals: 2020 2021 2022 2023 2024 Quizbank/University Physics Semester 2(tests) and maybe Quizbank/Electricity_and_Magnetism_(calculus_based) (?)
Tue 28 Aug edit
- QB/d cp2.5 Questions 1 and 2
Lab1: Mr Circuit inventory edit
Mr. Circuit inventory: Check off what's missing during daytime hours have Engineering replace (main office is waiting for you.) Report: What is (or what do you think is) each of the following:
- breadboard
- wire
- battery
- resistor
- diode
- potentiometer
- Transistor/SCR (Both have three leads).
Report is written, due at end of period. Can be very informal, but write good and clear (and honest) prose. If time permits, research the items on the internet, but write only what you understand. Include the symbol for each element
Tues 4 Sep 2018 T1 review edit
Almost finished with T1. Will finish during recitation
Lab2 PheT virtual ciruit edit
NEW SIMS: Circuit Construction Kit: DC
Abstract: This PhET virtual kit has an option for using wires with finite resistance, and voltage sources with internal resistance. Also,the battery "catches fire" if too much power is involved. We will use this to "verify" Ohm's law under conditions where it is not quite true.
Goal: To create a simple circuit, perhaps using lightbulbs and/or added impedances to create a situation where Ohm's law is a good approximation, but not so good that the graph of I versus V is not a perfect straight line. You will need to use either Excel or Matlab to make your graph.
Excel Graph edit
V | I | R |
---|---|---|
9 | 1 | 9.00 |
10 | 1.11 | 9.01 |
11 | 1.22 | 9.02 |
12 | 1.33 | 9.02 |
13 | 1.44 | 9.03 |
Tues 11 Sep Test 2 Flux edit
Lab edit
- Calculating area of a circle using integration over dA
- Gauss Law: Concentric spheres
Recitation edit
Gauss law non-uniform but symmetric sphere
- 3 part video: https://www.youtube.com/watch?v=00dl3hOu9eQ
- words w/optional 30 minute video: https://pages.uncc.edu/phys2102/online-lectures/chapter-3-gauss-s-law/3-1-gausss-law/example-6-electric-field-of-a-non-uniform-charge-distribution/
Tues 18 Sep: Test 2* edit
* I removed our questions pending today's lab:
Lab: Gauss Law edit
Quizbank/Electricity_and_Magnetism:_Gauss'_Law Wright State University Lake Campus/2017-9/Phy2410/Help with Gauss' law
Recitation edit
Projects for Wikiversity. Explain
- Double sum for PE (work) N charges. We will 4x4 square. W_11 W_12 (after defining them) Equation 7.3
- Example 7.5:
30 Watts * (1 J/s / 1W) { (V^-1) / (Q/J) } 12 volts
Tu 25 Sep: Start Test 3 edit
- 3/11 from Special:Permalink/1893815 to QB/d_cp2.7 | Equations
P=IV=(dq/dt)V=e(dN/dt)V relates power, voltage and e−/sec edit
Easy way to do Example 7.4:
This is much easier if you know the equations: Later in the course, we will establish: and
Calculating Work with the 1/r potential edit
Visualizing field lines and equipotentials edit
Look at these pictures to visualize electric field and potential I also like this one from the internet
But the best is [PhET
- 2/4 from Special:Permalink/1893633 to QB/d_cp2.8 | Equations
Capacitors "add" in parallel and series opposite to resistors edit
Lab edit
Force on plate of a charged capacitor (quiz question)
- Van Der Graff generator
- Recitation: The class "wrote a report" that applied Gauss' law to capacitor using a wonderful website sponsered by physics.lousville, which has a great quote they claim was put forth by an electric company:
“ | "We would be delighted if you send in your bill. However, if you don't, you will be." | ” |
Th 27 Sep Capacitors edit
See links in above Lab.
What to study for on Test 3 edit
In the example quizzes (d_cp 2.7 and 2.8 series)
2.7 examples:
- example 7.1: study?
- example 7.2: not in study guide
- example 7.3: not on test
- example 7.4: know
- example 7.5: know
- example 7.6:easy
- example 7.8:easy, but not on test
2.6
- Study Examples 8.6 and 8.7. Both are on test, but on 8.7 you only need to find the charge (do so by finding the total capacitance and using the given voltage.)
Tues test 3 edit
Thur 15:28, 4 October 2018 (UTC) edit
- Do you already know this?
- A Mathematician's Lament for reference only
- 842002338#Reform_curricula Why skepticism about "scientific expertise" is sometimes valid. See also w:Mathland
- w:Mathematical beauty
- Amazing things I have seen in the classroom
- quality MIT lecture on circuits
Test 4 was Tuesday 16 October edit
Tues 9 October Kirchoff loop law problem edit
Test 5 is Tuesday 29 30 October
edit
The important examples in QB/d cp2.11 are: Prob 1:Example 11.1 Prob 2:Example 11.2 Prob 3:Example 11.2 Prob 4:Example 11.4 Prob 5:Example 11.5 Prob 6:Example 11.7 Prob 7:Example 11.8 Prob 8:Example 11.9 Prob 9:Example 11.10
The important examples in QB/d cp2.12 are: Prob 1:12.2 Prob 2:Example 12.3 Prob 3:Example 12.3 Prob 4:Example 12.4 Prob 5:Example 12.5 Prob 6:Example 12.7 Prob 7:Example 12.6? Prob 8:Example 12.8 Prob 9:Example 12.8 Prob 10:Example 12.9 Prob 11:Example 12.10
Next edit
- [Induction video (fun) https://www.youtube.com/watch?v=gfJG4M4wi1o ]
- kahn euler
Quizbank/University Physics Semester 2/T7 edit
3/9 from Special:Permalink/1893631 to QB/d_cp2.13 | Equations
2/6 from Special:Permalink/1892308 to QB/d_cp2.14 | Equations
3/8 from Special:Permalink/1894891 to QB/d_cp2.15 | Equations
1/2 from Special:Permalink/1863345 to QB/a23InductionACcircuits_Q1 | Equations
1/4 from Special:Permalink/1863343 to QB/a21CircuitsBioInstDC_RCdecaySimple | Equations
From wikipedia:Euler's formula edit
We begin with
d edit
For real values of x we have:
But how can we verify that these infinite series expansions are valid?
- Use a spreadsheet
- Take derivatives: The series all match at x=0: . Term by term it is easy to show that and also that the sine and cosine expansions also work out. If a polynomial and a function match values at x=0 and if all their derivatives match, does that mean that the (infinite) polynomieal (i.e. expansion) EQUALS the function? Not always.
- Go deep into the mathematical logic of the calculus of complex numbers (called "complex analysis")
Lab report due Tuesday 20 November edit
- The lab will introduce a report due next Tuesday 20 November (on the three "bad" questions on a quiz).
- See QB/d cp2.13 especially File:Quizbankqb_d_cp2.13.pdf or this page (Problems 7, 8, 9).
Full explanation based on Ampere's Law, Faraday's Law. I don't think you need Gauss's Law.
Later I might do this edit
- E due to rho of x in a slab: https://www.youtube.com/watch?v=H72xpjt24UE
15 Nov Ray Diagrams edit
Final Exam Examples edit
2.11 edit
2/9 from Special:Permalink/1902372 to QB/d_cp2.11 | Equations
2.12 edit
2/11 from Special:Permalink/1892310 to QB/d_cp2.12 | Equations
2.13 edit
1/9 from Special:Permalink/1893631 to QB/d_cp2.13 | Equations
- Example 13.1 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:BTZF6vX4@2/131-Faradays-Law_1
- Example 13.2 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:ZNcjduzK@4/132-Lenzs-Law_1
- Example 13.3 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:ZNcjduzK@4/132-Lenzs-Law_1
- Example 13.3 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:ZNcjduzK@4/132-Lenzs-Law_1
- Example 13.5 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:UbKygyP4@2/133-Motional-Emf_1
- Example 13.6 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:UbKygyP4@2/133-Motional-Emf_1
- Example 13.7 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:F-UkvfQz@3/134-Induced-Electric-Fields_1
- Example 13.8 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:F-UkvfQz@3/134-Induced-Electric-Fields_1
- Example 13.8 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.7:F-UkvfQz@3/134-Induced-Electric-Fields_1
2.14 edit
1/6 from Special:Permalink/1892308 to QB/d_cp2.14 | Equations
- Example 14.1 from OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:H8S6dNUY@2/141-Mutual-Inductance_1
- Example 14.2 OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:9IPDyGBX@2/142-Self-Inductance-and-Induct_1
- Example 14.6 from OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:gPV9xl9u@2/143-Energy-in-a-Magnetic-Field_1
- Example 14.4 from OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:vsb1s41R@3/144-RL-Circuits_1
- Example 14.5 from OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:vsb1s41R@3/144-RL-Circuits_1
- Example 14.6 from OpenStax University Physics 2: https://cnx.org/contents/eg-XcBxE@9.7:tIlYnK5w@2/145-Oscillations-in-an-LC-Circ_1
2.15 edit
1/8 from Special:Permalink/1894891 to QB/d_cp2.15 | Equations
- Example 15.1 from OpenStax University Physics2: http://cnx.org/content/col12074/1.3_1
- Example 15.1 from OpenStax University Physics2: http://cnx.org/content/col12074/1.3_1
- Example 15.1 from OpenStax University Physics2: http://cnx.org/content/col12074/1.3_1
- Example 15.2 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@14.10:JOs6racw@8/15-3-RLC-Series-Circuits-with-AC
- Example 15.4 from OpenStax University Physics2: http://cnx.org/content/col12074/1.3_1
- Example 15.5 from OpenStax University Physics2: http://cnx.org/content/col12074/1.3_1
- Example 7.15 from OpenStax University Physics2: https://cnx.org/contents/eg-XcBxE@9.8:z70YwVma@4/156-Transformers_1
2.16 edit
2/6 from Special:Permalink/1895295 to QB/d_cp2.16 | Equations
Latest (bottom of page) edit
https://openstax.org/details/books/university-physics-volume-2