Electricity, Magnetism, & Optics (5)

UM-StL Evening Physics 112 - Winter/Spring '96

A phenomenological introduction to the concepts and laws of electricity and magnetism, electromagnetic waves, optics and electrical circuits for physics majors and students in other departments. Three hours of (interactive) lecture, one hour of discussion, and two hours of laboratory per week.

For current semester information, go here.

Questions this course might help you answer...

  • How many excess electrons are needed to stick a balloon to the ceiling?
  • How wide is the ionized column during a lightning strike?
  • What happens to gravity at the earth's center?
  • How much excess charge is needed to make a 6-inch human hair stand on end?
  • How can we make portable the power needed to restart a fibrillating heart?
  • Why don't we for fun use like-charged floors and body-suits to cancel gravity?
  • What it is about an electric guitar that enabled Jimi Hendrix to do new things?
  • Does high voltage make magnetic fields from power lines larger or smaller?
  • How does relativistic length-contraction keep your refrigerator magnets from falling?
  • Why don't electric eels shock themselves?
  • If you put one of the two batteries into a flashlight backwards, what happens?


    Other resources of possible interest:
  • Browser-interactive solver for constant acceleration problems.
  • A question involving relativistic acceleration which contains what you need to solve it.
  • Try focussing a high-res electron microscope image on-line!
  • Does making a hotdog require 50 nanoseconds or more of life's power stream?
  • Is statistical physics a dead subject, or is there another paradigm change afoot?
  • In preparation: assignment list, example tests, course calendar, homework/exam solutions...
  • What other resources might help you? E-mail suggestions to philf@newton.umsl.edu.
  • At UM-StLouis see also: a1toc, cme, i-fzx, phys&astr, programs, stei-lab, & wuzzlers.
  • Some current and previous courses: p111, p112, p231, p341, p400.
  • Cite/Link: http://newton.umsl.edu/~philf/p112w96s.html
  • This release dated 15 Feb 1996 (Copyright by Phil Fraundorf 1988-1996)
  • You are visitor number to our Physics 112 cover pages, since 7 Feb 1997.
    Visualizing some Possible Exam Problems: DiPole, DiWire, {+2-1} Charge Triplet
    Equipotential Lines around Scattered Charges
    Can you draw in the field lines?

    Eligibility: Physics 111 and Math 175 are prerequisites. If you earned a grade of D or F in either one of these courses, you do not qualify to take Physics 112.

    Text: Physics for Scientists and Engineers (3rd Edition), by Serway

    Interactive Lecture: P. Fraundorf, T & R 5:30-6:45pm, B122 Benton. Office hours: T 6:45-7:15pm or by appointment, B421 Benton Hall.

    Laboratory: Tuesdays 6:55-8:45pm, B335 Benton Hall. The lab will consist of a series of experiments for which detailed instruction sheets are provided in the manual (by Loyd) accompanying the textbook. You will be expected to have studied the instruction sheets and to have completed the "Pre-Lab Assignment" beforehand. (Your teaching assistant may be consulted briefly a few days before the experiment is performed.) The pre-Lab is worth a third of the lab grade. Also, be sure to participate in all the experimental work during the lab session as each of you will be tested on the details of the lab work at the end of the semester.

    Discussion: T & R 5:05-5:30 pm B122 Benton Hall. The discussions will start the first Thursday of the semester.

    Homework: Each of the assigned problems (see attached sheet) will be worth 1 point. No late hand- in's will be accepted. Supplemental homework problems, undiscovered errors in the book that you bring to our attention, and classroom activities (e.g. presentations and quizzes), may let you increase your homework score as well.

    Current Homework Sheet:

    Exams: There are three in-class exams and one final (see attached Syllabus). There will be no make-up exams given. A missed exam is entered as 0% in your grade statistics.

    Current Syllabus:

    Grades: Labs (pre-lab, report, & test) count 30%, homework 10%, the three hour-exams 12% each, and the comprehensive final 24%, toward your final grade. Numerical letter grades (e.g. A*4.0, 3.0*B<4.0, 2.0*C<3.0, etc.) for each of the above activities will be set equal to CourseSD*[(N-M)/S)] + CourseMean. Here N is the number of points you receive for that activity, {M, S} are the class mean and standard deviation for the activity, and {CourseMean, CourseSD} are the final grade mean and standard deviation for the whole course. After each exam, I will give you values of M and S as well as your score N, so that you can calculate a numeric grade for the exam. Use CourseMean=3.0 and CourseSD=1.0 for this estimate. The exact value for CourseMean (usually up, nearer to 3.1) and CourseSD (usually little changed) will be chosen after the final, to reflect overall class performance and to minimize grade roundoff error for individuals just beneath a cutoff.

    Drops: The University regulations regarding drops will be strictly enforced. You may drop without a grade prior to 12 February 1996. After that date you will receive the grade you have earned up to the point of the drop.

    Symbols: Make sure that you know the Greek alphabet and special Mathematical Symbols, which will be constantly used in this course. Consult the back cover of the textbook.

    MathReview: There is a very useful collection of trigonometry, and differential and integral calculus formulae in the back of the text for quick reference and review (Appendix B). Make sure that you know this material!