University Physics III

This site served the Fall 2005 term of University Physics III. The course has completed, and the site is now closed. Feel free to browse through the site if you wish, but I don't guarantee all the links still work.

The final exam has been graded and posted on webassign. You can view your particular score there. The average was 71, and the distrubution can be seen below.

I have also posted your final grades. You know where to find them. If you have any questions, or would like to see your final exam, feel free to see me after the break.

Have a good holiday!

Today is your final exam. It is in 08-1250, where we have been taking our exams of late.

Thursday, 17 November 2005
2:45 pm -- 4:45 pm
in 08-1250

As I have stated earlier, the final exam will not be rescheduled for airlines, Thanksgiving dinners, etc.

All necessary equations (and some unnecessary ones) will be provided. No calculators, iPods, PDAs, etc. will be allowed. Cell phones should be turned off and stowed away. Make sure you have a backup pen or pencil. You will have 2 hours to complete the exam.

The equation sheet for the final exam can be found here. Other physics sections will be taking their exam in the same room. Be sure you take the exam with my name on it...

You may not bring this sheet with you. A copy of the equation sheet will be attached to the top of your exam.

There are several 313 Review Sessions scheduled, and they are as follows:

Tuesday afternoon 3-5 Brian Koberlein
Wednesday 2-4 Dawn Hollenbeck
Wednesday 4-6 Anne Young
Thursday  10-12 Linda Barton

All of which are in 08-3154.

Anyone may attend any of the sessions. Come prepared with questions.

Today we will summarize all the laws we have for electric and magnetic fields, known as Maxwell's equations. We will also look at one of the interesting consequences for these laws.

We will also review for the final exam, so come prepared with questions.

Today we will continue our discussion of inductance, and see how this affects circuits. We will also look at how inductors, capacitors and resistors work in a circuit. This will lead us to Maxwell's equations...

The third exam has been graded and posted on webassign. You can view your particular score there. The average was 79, and the distrubution can be seen below.

Today we will look at how currents can be induced by motion. We will also look at eddy currents in conductive materials. We will also begin our discussion of inductance in a wire.

Today will be our third exam. It will not be held in our regular rooms, but in 08-1250. This is the same room as last time. It will cover RC Circuits, Magnetic Fields, Lorentz Force Law, torque on a current loop, Biot-Savart Law (and simple geometry problems), fields and forces between wires, Ampere's Law, Energy Fields, and basic induction concepts. It will not cover detailed Faraday calculations.

All necessary equations (and some unnecessary ones) will be provided. No calculators, iPods, PDAs, etc. will be allowed. Cell phones should be turned off and stowed away. Make sure you have a backup pen or pencil. You will have 50 minutes to complete the exam.

Today we will continue our discussion of Faraday's Law. We will also discuss Lenz' law. If we have time, we will review for the third exam.

Lenz Law: Download PDF

Magnetic Induction: Download PDF

The equation sheet for the first exam can be found here. Other physics sections will be taking their exam in the same room. Be sure you take the exam with my name on it...

You may not bring this sheet with you. A copy of the equation sheet will be attached to the top of your exam.

Today we will continue our discussion of Ampere's Law and look at solenoids. We will also begin our discussion of induced fields. This will lead to Faraday's Law

Solenoid: Download PDF

Two Long Wires: Download PDF

Today we will continue our discussion of the magnetic fields produced by currents, this time to look at Ampere's Law. Just as Gauss' Law can simplify finding the electric field, Ampere's Law can simplify finding the magnetic field.

We will also look at the energies stored in magnetic and electric fields.

Ampere's Law: Download PDF

Non-uniform Current: Download PDF

Harder Problems: Download PDF

Field Energies: Download PDF

Today we will continue our discussion of Biot-Savart, and look at the forces between wires.

Two Long Wires: Download PDF

A Current Loop: Download PDF

Today we will look at the magnetic fields created by moving charges, known as the Biot-Savart Law. We will also work through several problems.

Biot-Savart: Download PDF

Today we will have a demonstration of charges moving in a magnetic field. We will also look at the forces which occur on a current in a magnetic field. You will have a hard time with this, and it will take a while to do it. But it will lead us to another electromagnetic equation...

Force on a Current Loop: Download PDF

Today we will look at some of the useful experimental properties of magnetic fields. We will see how we can determine the charge to mass ratios of particles, and we will look at the Hall effect, which lets us determine that electrons move in metals, not protons (among other things). We will also begin a discussion of the magnetic forces between currents.

Circular Motion: Download PDF

Hall Effect: Download PDF

Today we will begin our discussion of magnetic fields. We will map some basic magnetic fields, note the lack of magnetic "charge". We will look at Gauss's law for magnetic fields, magnetic dipoles, and the Lorentz force. This last one will require a review of the cross product.

Mapping B-fields: Download PDF

Lorentz Force: Download PDF

Velocity Selector: Download PDF

The second exam has been graded and posted on webassign. You can view your particular score there. The average was 74, and the distrubution can be seen below.

Today we will finish our discussion of RC circuits, including a more detailed discussion of the energy of a capacitor. We will then build an RC series circuit, and analyze it. This will be done as a full formal lab, due in one week.

RC Circuit Lab: Download PDF

Today will be our second exam. It will not be held in our regular rooms, but in 08-1250. This is a different room from last time. It will cover electric potential, Ohm's Law, circuits, Kirchoff's Laws, resistors, capacitors, and applications. It will not cover RC circuits.

All necessary equations (and some unnecessary ones) will be provided. No calculators, iPods, PDAs, etc. will be allowed. Cell phones should be turned off and stowed away. Make sure you have a backup pen or pencil. You will have 50 minutes to complete the exam.

Today we will look at the behavior of resistors and capacitors in circuits. We will also review for our second exam, which is tomorrow.

Resistors and Capacitors: Download PDF

RC Circuits: Download PDF

The equation sheet for the first exam can be found here. Other physics sections will be taking their exam in the same room. Be sure you take the exam with my name on it...

You may not bring this sheet with you. A copy of the equation sheet will be attached to the top of your exam.

Today we will build a simple capacitor. We will also look at capacitors in circuits.

Build a Capacitor: Download PDF

Capacitor Circuits: Download PDF

Capacitor Problem: Download PDF

More Capacitors: Download PDF

Today we will finish our discussion of resistors in circuits. We will build a circuit and compare it to Kirchoff's laws. We will also look at the properties of batteries in circuits. We will then begin our discussion of capacitance. As we will see, we have studied capacitors before...

Kirkoff Circuit: Download PDF

Batteries and Resistors: Download PDF

Capacitors: Download PDF

The final exam will be held on:

Thursday, 17 November 2005
2:45 pm -- 4:45 pm
in 08-1250

Mark your calendars accordingly. The final exam will not be rescheduled for airlines, Thanksgiving dinners, etc.

Today we will look a set of rules for figuring out circuits, known as Kirchoff's Laws. We will apply these rules to solving some general circuits.

Kirkoff's Laws: Download PDF

A Sample Circuit: Download PDF

Today we will look at the temperature dependence of Ohm's law. We will also look at how some devices clearly do NOT obey Ohm's Law.

Temperature Dependence: Download PDF

Ohmic and Non-Ohmic Devices: Download PDF

Today we will finish our discussion of potential and voltage. We will start with a discussion of Ohm's Law. This will let us study arrangements of resistors. We will also study the nature of resistance, and determine the resistivity of a Nichrome wire.

Resistor Circuits: Download PDF

Resistivity of Nichrome: Download PDF A wire gauge sheet will be useful here: Download PDF

Measuring Circuits: Download PDF

Today we will look at a range of Voltage problems.

Cyllidrical Voltage: Download PDF

Dipole Voltage: Download PDF

Voltage and Charge Distributions: Download PDF

Voltage and Work: Download PDF

The first exam has been graded and posted on webassign. You can view your particular score there. The average was 70, and the distrubution can be seen below.

Today we will continue our discussion of electric potential and potential energy. As we will see, this greatly simplifies kinematics problems. We will also look at how to find the voltage from the electric field.

Work and Potential Energy: Download PDF

Potential and Kinetic Energy: Download PDF

Voltage from Electric Field: Download PDF

Remember: Your lab from Monday is due today.

Today we will discuss another way electric fields can be represented, the electric potential. Potential has the advantage that it is a scalar, from which the electric field can be derived. It also relates easily to potential energy. We will also do our first long lab today. You will be handing this lab in on Wednesday.

Mapping Field Lines: Download PDF

Today will be our first exam. It will not be held in our regular rooms, but in 07A-1350 (7A is straight across the quad from Gosnell). It will cover Coulomb's Law, electric fields, charge distributions, flux, Gauss' Law and applications.

All necessary equations (and some unnecessary ones) will be provided. No calculators, iPods, PDAs, etc. will be allowed. Cell phones should be turned off and stowed away. Make sure you have a backup pen or pencil. You will have 50 minutes to complete the exam.

Today we will finish our discussion of Gauss' Law. We will also review for the first exam. If you have questions on topics we have covered, or homework problems, today would be a good day to bring them up.

The equation sheet for the first exam can be found here. (It may not seem like much, but it will grow with each exam.) For those who are wondering, the KOBERLEIN on the sheet is due to the fact that other physics sections will be taking their exam in the same room. Be sure you take the exam with my name on it...

You may not bring this sheet with you. A copy of the equation sheet will be attached to the top of your exam.

Today we will look at how Gauss can be applied to non-uniform charge distributions.

Metal Sphere: Download PDF

Metal Sphere: Download PDF

Non-Uniform Sphere: Download PDF

Cylinders: Download PDF

Today we will begin with a discussion of conductors and insulators. As we will see, conductors have no electric fields in their interior. This has some interesting consequences. We will then use Gauss' Law to look at some symmetrical charge distributions in metals and conductors.

Solid Sphere: Download PDF

Hollow Sphere: Download PDF

The location for our first exam will be in 07A-1350. (Building 7A is across the quad from Gosnell) I strongly recommend everyone find the room before the day of the exam. If you show up late, you will not be given extra time.

Today we will continue our discussion of flux. From this we will look at Gauss' Law, which will make many of our problems MUCH more simple.

Flux Cyllinder: Download PDF

Rod of Charge: Download PDF

Flat Sheets: Download PDF

We can use Gauss' law to derive all the equations on our summary sheet.

Today we will finish the ring of charge problem, and extend the idea to an infinite sheet of charge. We will also look at an infinite line of charge (which you will solve). Then we will then look at charge distributions which are non-uniform.

Non-Uniform Line: Download PDF

Half Circle: Download PDF

More Arcs: Download PDF

We now have looked at several important examples, and we can summarize this here (this is useful!):

Summary: Download PDF

As time permits, we will look at the definition of flux.

Flux: Download PDF

We will talk more of this on Thursday.

Now that we can calculate the fields of point charges, we can begin calculating the fields of charge distributions. This will involve our old friend the integral...

Numerical Approximation: Link

Distributed Charge: Link

Ring of Charge: Download PDF

We can then extend this to calculating the field of a disk, and then a large sheet. It is all very complicated, but there is a simpler way...

WebAssign is now up, and all of you should be registered. You can see the instructions for how to log on here.

If you have any problems logging in (After you have read the above link!), then send me an email or IM. You should access WebAssign in the next day or so, as there is already a homework assigned.

One word of note: Your grades and averages will also be available online through WebAssign. However I am still setting up the gradebook. Pay no attention to what the gradebook says for a while.

It was called to my attention that the homework problem I assigned yesterday wasn't online. It is now, and you can find it here:

Dipole in a Field: Download PDF

Today we will look at the electric fields produced by charges. These are vector fields, and are determined by measuring the forces between charges.

Introduction to E-Fields: Download PDF

Sketching E-Fields: Download PDF

E-Field of Two charges: Link

And for a challenge:

Dipole Fields: Download PDF

And the homework problem:

Dipole in a Field: Download PDF

Now that we have introduced Coulomb's Law, we will look at how it is applied to various problems. We will start with a discussion of some useful strategies in solving electrostatic problems, then go through some examples.

Problem Strategies: Download PDF

A Basic Problem: Download PDF

More Problems: Download PDF

Two Charges: Download PDF

A Trick-y One: Download PDF

Today's workshop will start with a general introduction to the course. We will go over the workshop format and related items. For arts and crafts everyone will make a nametag, and I will take everyone's picture so I can relate faces to names. We will begin the class by studying the concepts of charge and the electric field, leading up to Coulomb's Law.

Initial Ideas: Download PDF

Charged Tape: Download PDF

Electric Forces: Download PDF

For the last exercise, it might be useful to have graph paper, which can be downloaded here.

Note: as you form your lab groups, you might want to share contact information. A contact sheet is available here.

There has unfortunately been an error in textbooks. If you purchased Halliday and Resnick, you have the wrong text. You will need to return to the bookstore and purchase Cummings, which is the correct one. There may be a shortage of correct texts for a few days, but it will all work out in the end.

This course integrates lectures into the workshop format. This means there is no separate lecture for the class. For an outline of what we are covering each day, see the workshop section of this site.