PHYS 436 :: Physics Illinois :: University of Illinois at UrbanaChampaign
Schedule
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New Homework assignments will be published on this page on Wednesdays and discussed briefly in the next class meeting (Friday). They will be due on Fridays of the next week at 1159 pm. Just to be clear, that is 9 days after the homework is assigned. You can submit your homework up to two days later (Sunday evening at 1159pm) for 90% credit. After that late deadline, no credit can be earned. On Tuesdays at 5 pm we will have an office hour to discuss the assignment due on Friday of that week. Between the discussion in class on Fridays and the HW office hour on Tuesdays, you should be able to avoid spinning your wheels unproductively.
To hand in HW assignments, we use Gradescope. If you do your HW on paper, carefully scan your solution pages to produce a clean and legible pdf file. If you use an electronic tablet for your work, use it to produce a pdf file. Submitt your file to the Gradescope HW depository. It is important that your file can actually be read and graded. Illegible files will not be graded and will result in zero credit.
Starting on Monday Jan 23, 2023, we will use iClickers to poll the class on questions on topics we have are covering in class. As of right now, we will not grade the responses, but participation in this activity will feed into the classroom participation grade. You need to register your iClicker for this class using your Gradebook page.
Mediaspace link for lecture recordings: Lectures. https://mediaspace.illinois.edu/channel/PHYS+435+2023+Spring/286930562
Date  Lecture  Reading  Homework  Discussion  Exams 

Wednesday 1/18/2023 
Lecture 1 
Griffiths Chapter 1 Divergence Theorem and Stokes Theorem. Griffiths 2.1 and 2.2 Also, glance at Appendix A 
Assign HW1 due Jan 27, 2023 for 100% Jan 29, 2023 for 90% HW1 Solution 

Thursday 1/19/2023 

Friday 1/20/2023 
Lecture 2 Electric Potential Function for Static Sources Solution by Superposition Lecture2.pdf 
Griffiths Sec.2.3  Introduce HW1  
Monday 1/23/2023 
Lecture 3 Efield Interaction Energy Efield Energy Density Continuous charge density vs point charges Lecture3.pdf 
Griffiths Sec. 2.4 
Discussion 1 pdf Solutions1 pdf 

Tuesday 1/24/2023 
HW1 Homework Office Hour 144 Loomis 56pm 

Wednesday 1/25/2023  Lecture 4 Conductors and Capacitance Lecture4.pdf 
Griffiths Sec. 2.5 
Assign HW2 

Thursday 
Curl Subtleties 

Friday 1/27/2023 
Lecture 5 Electric Potential Function Boundary Conditions and Uniqueness Lecture5.pdf 
Griffiths Sec. 3.1 
Introduce HW2 

Monday 1/30/2023 
Lecture 6 Efield and Potential from charges and conductors Method of Images Problems with Rectangular Symmetry Lecture6.pdf 
Griffiths Sec. 3.1 and 3.2.13 
Discussion 2 Solutions 2 pdf 

Tuesday 1/31/2023 
HW2 Homework Office Hour 144 Loomis 56pm 

Wednesday 2/1/2023 
Lecture 7 Method of Images Problems with Spherical Symmetry Solution for V(r) Inside and outside a grounded Conducting Sphere Lecture7.pdf 
Griffitrhs Sec 3.2.4  Assign HW3 due 1159pm Feb 10 100% or due 1159pm Feb 12 90% HW3 Solution 

Thursday 2/2/2023 

Friday 2/3/2023 
Lecture 8 Separation of Variables for [grad^2]V(r) = 0 Boundary Value Problems with Rectangular Coordinates Lecture8.pdf 
Griffiths Sec 3.3.1  Introduce HW3 HW2 due due 1159pm Feb 3 for 100% or 1159pm Feb 5 for 90% 

Monday 2/6/2023 
Lecture 9 Separation of Variables Solutions in Rectangular Coordinates Fourier Series Solutions Lecture9.pdf 
Griffiths Sec. 3.3.1 Notes 
Discussion 3 Solutions 3 

Tuesday 2/7/2023 
HW3 Homework Office Hour 144 Loomis 56pm 

Wednesday 2/8/2023 
Lecture 10 Separation of Variables in Spherical Coordinates Legendre Polynomials and Spherical Harmonics Lecture10.pdf 
Griffiths Sec. 3.3.2  Assign HW4 due 1159pm Feb 17 100% or due 1159pm Feb 19 90% HW4 Solution 

Friday 2/10/2023 
Lecture 11 Examples of Spherical Problems Lecture11.pdf 
Griffiths 3.3.2 
Introduce HW4 

Monday 2/13/2023 
Lecture 12 Green's Functions Solve All Potential Problems! Green's Identity Charges and Boundary Conditions Lecture12.pdf 
Notes Only  
Tuesday 2/14/2023 
HW4 Office Hour 144 LLP 56 pm 

Wednesday 2/15/2023 
Lecture 13 Fields from Charges Viewed from Far Away Expansion of Electric Potential in Multipole Moments First Example of Hierarchical Approximations 
Griffiths 3.4  Assign HW5 due Feb 24 1159pm for 100% or Feb 26 1159 pm for 90% HW5 Solution 


Thursday 2/16/2023 

Friday 2/17/2023 
Lecture 14 Dipoles 
Griffiths 3.4.1 
Introduce HW5 

Monday 
Lecture 15 Introduction to Dielectrics Polarization Density Vector Field P Bound Polarization Charge 
Griffiths 4.1 and 4.2  
Tuesday 2/21/2023 
HW5 Office Hour 144 LLP 56 pm 

Wednesday 2/22/2023 
Lecture 16 Introduction to Dielectrics Linear Dielectrics Susceptibility to Polarization by an Applied Efield Emergence of Bound Polarization Charge Self Consistent Solution Required! 
Griffiths 4.4.1  Assign HW6 due by March 10 for 100% or due by March 12 for 90% HW6 Solution 


Thursday 2/23/2023 

Friday 2/24/2023 
Lecture17 The "Displacement" Vector Field D D is a helper Field Boundary Conditions: Matching Dperp and Eparallel at Dielectric Boundaries Cartesian Coordinate Problems 
Griffiths 4.3 
Introduce HW6 

Monday 2/27/2023 
Lecture 18 Boundary Value Problems with Dielectrics Spherical Problems 
Griffiths 4.2 and 4.3  
Tuesday 2/28/2023 
MT1 Office Hour 

Wednesday 3/1/2023 
MidTerm 1 
Griffiths 4.4 
MidTerm 1 

Thursday 3/2/2023 

Friday 3/3/2023 
Lecture 20 
Griffiths 5.1, 5.2 and 5.3 
Reintroduce HW6  
Monday 3/6/2023 
Lecture 21 Electric Currents Ampere's Law Law of Biot and Savart is Complicated! 
Griffiths 5.13  
Tuesday 3/7/2023 

HW6 Office Hour 144 LLP 56 pm 

Wednesday 3/8/2023 
Lecture 22 
Griffiths 5.4 Griffiths Appendix B 
Assign HW7 due March 24 for 100% HW7 Solution 

Thursday 3/9/2023 


Friday 3/10/2023 
Lecture 23 
Griffiths 5.4.2  Introduce HW7 HW 6 due Due Mar 10 11:59 pm 100% Due 1159pm Mar 12 90% 

Monday 3/20/2023 
Lecture 24 Magnetic Multipoles Levi Civita Symbol 
Griffiths 5.4.3  
Tuesday 3/21/2023 

HW7 Homework Office Hour 144 Loomis 56pm 

Wednesday 3/22/2023 
Lecture 25 
Griffiths 6.1  Assign HW8 due by March 31 1159pm for full credit HW8 Solution 


Thursday 3/23/2023 

Friday 3/24/2023 
Lecture 26 Magnetic Materials, Magnetization Density, M. 
Griffiths 6.1  Introduce HW8 HW7 due due March 24 for 100% or March 26 for 90% 90% 

Monday 3/27/2023 
Lecture 27 Bound Currents, Magnetized Objects 
Griffiths 6.23 


Tuesday 3/28/2023 

HW8 Office Hour 144 Loomis 56 pm 

Wednesday 3/29/2023 
Lecture 28 
Griffiths 6.3  Assign HW9 due by April 14, 2023 for full credit HW9 Solution 


Thursday 3/30/2023 

Friday 3/31/2023 
Lecture 29 
Notes 
Introduce HW9 

Monday 4/3/2023 
Lecture 30 
Griffiths 6.3  
Tuesday 4/4/2023 

HW9 Office Hour 144 Loomis 56 pm 

Wednesday 4/5/2023 
Lecture 31 
Griffiths 7.1  HW10 due April 19 at 1159pmpm for 100% due April 23 1159pm for 90% HW10 Solution 


Thursday 4/6/2023 

Friday 4/7/2023 
Lecture 32 
Notes Griffiths 7.2 
HW9 due due 1159pm April 7 100% or due 1159pm April 9 for 90% 


Monday 4/10/2023 
Lecrture 33 Repairing Ampere's LawEnergy in fields Magnetic Field energy density Poynting's Vector 
Griffiths 7.3 

Solution 11  
Tuesday 4/11/2023 

discuss Midterm 2  
Wednesday 4/12/2023 
Lecture 34 
Griffiths 8.1.2 Notes 

Midterm 2 90 minutes long 

Thursday 4/13/2023 

Friday 4/14/2023 
Lecture 35 
Notes Griffiths 9.12 
HW9 due for full credit 1159pm due Sunday 4/16 at 1159pm for 90% credit 

Monday 4/17/2023 
Lecture 36 
Griffiths 9.2 Notes 


Tuesday 4/18/2023 

HW10 Homework Office Hour 

Wednesday 4/19/2023 
Lecture 37 
Griffiths 9.2 Notes 



Thursday 4/20/2023 

Friday 4/22/2022 
Lecture 38 
Griffiths 9.3.23 Notes 
Introduce HW11 

Monday 4/24/2023 
Lecture 39 Reflection and Refraction from Dielecrtric Interfaces II 
Griffiths 9.3.3 
Assign HW11 

Tuesday 4/25/2023 

HW11 Homework Office Hour 144 Loomis 56pm 

Wednesday 4/26/2023 
Lecture 40 
Notes Griffirths 9.4 


Thursday 4/27/2023 

Friday 4/28/2023 
Lecture 41 
Notes  
Monday 5/1/2023 
Lecture 42 Review Statics 
HW11 due due May 1 1159pm for 100% due May 3 1159pm for 90% 

Tuesday 5/2/2023 


Wednesday 5/3/2023 
Lecture 43 
HW11 due due May 3 1159pm for 90% 


Thursday 5/4/2023 
Reading Day  
Friday 5/5/2023 
Exams Start 

Friday 5/12/2023 
Final Exam via Zoom 130430pm 
