CVGS Physics Unit 15
The Electromagnetic Force: Magnetism
Objectives
This unit looks at the other characteristic of the electromagnetic interaction, magnetism.
Magnetic fields are produced by moving charges. Equations can be developed for calculating
the magnetic field produced by a long straight wire, a circular loop, a circular coil, and a
solenoid. Magnetic materials can be classified as diamagnetic, paramagnetic, or
ferromagnetic. You will also learn how freely moving charges and current carrying wires are
affected by external magnetic fields. (Course Objectives #1, 2, 3, 4, 5, 6, 8, 15, 17; VA SOL
PH1, PH2, PH3, PH5, PH12; C/T12.1, C/T12.2, C/T12.4)
You should be able to do the following:
1. Demonstrate an understanding of the following concepts:
a. Magnetism
b. Monopoles & dipoles
c. Magnetic field (long straight wire, circular loop, circular coil, and solenoid)
d. Diamagnetism, paramagnetism, and ferromagnetism
e. Electrodynamics
f. Ampere’s Law
g. Biot-Savart Law
h. Magnetic force on moving charges and current carrying wires
2. Describe magnetism on an atomic scale.
3. Draw and interpret magnetic field diagrams.
4. Compare magnetic and electric fields.
5. Solve problems involving (a) magnetic fields for different situations, (b) the
electromagnetic interaction (force) between an external magnetic field applied to freely
moving charges or to current carrying wires, and (c) the torque produced by an external
magnetic field applied to current carrying wires.
6. Determine the direction of magnetic fields using the right hand rule.
Equations
(List important equations on the back of this page.)
Assignments
AP 15 (Chpt. 19): 1, 12, 21, 22, 28, 60, 70, 79, 95, 97, (EC82)
Lab 15: Magnetic Fields
Resources
Text: Chapter 19
Text CD: Warm-Ups: Magnetic Fields; Force on a Moving Charge; Force on a Current
Carrying Wire
Walk-Throughs: 19.1-19.7
Explorations: Charged Particles in a Magnetic Field; Magnetic Field of a
Straight Conductor; Forces on Parallel Conductors; Velocity Selector
Further Discussion: Ampere’s Currents; Auroras and Radiation Belts;
Magnetic Dipole Moment
Cartoon Guide to Physics, Chapters 17 & 18
Optional DQ: 2, 5, 8, 13, 16, 17
Websites: http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfie.html
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/magfor.html#c1
Revised 3/15/07 (Created 3/13/02)