Lesson 34: Magnets William Gilbert, personal physician by appointment to her Majesty Queen Elizabeth I of England, discovered that the earth behaves like a giant magnet. Magnetism as a natural phenomenon, the behavior of magnetic materials, and the motion of charged particles in a magnetic field.
Instructional Objectives
* Be able to calculate the magnetic force on a current element and on a moving charge in a given magnetic field.
* Know the definition of torque and potential energy for a magnetic dipole.
* Be able to explain the concept of domains in ferromagnetic materials.
* Be able to use the definition of magnetic flux and discuss the significance of the result that the net magnetic flux out of a closed surface is zero.
* Be able to calculate the magnetic moment of a current loop and the torque exerted on a current loop in a magnetic field.
* Be able to discuss the magnetism of the Earth.
This series helps teachers demystify physics by showing students what it looks like. Field trips to hot-air balloon events, symphony concerts, bicycle shops, and other locales make complex concepts more accessible. Inventive computer graphics illustrate abstract concepts such as time, force, and capacitance, while historical reenactments of the studies of Newton, Leibniz, Maxwell, and others trace the evolution of theories.
The Mechanical Universe helps meet different students' needs, from the basic requirements of liberal arts students to the rigorous demands of science and engineering majors. This series is also valuable for teacher professional development. Produced by the California Institute of Technology and Intelecom.
Caltech: The Mechanical Universe - 34 - Magnetism.
