Electric Fields (03:27)
FREE PREVIEW
The evolution of electric field theory is examined. Methods developed for indicating the strength of an electric field around a charged object, and the direction in which the field acts, are described.
Magnetism (01:49)
Properties of magnets are examined. The attractive and repulsive forces of magnetized objects are explored.
Magnetic Fields (02:01)
It is an accepted theory that magnetized objects are surrounded by fields of magnetic force. Properties and behavior of magnetic fields are examined.
Electromagnetism (01:27)
In 1819 Danish physicist Hans Christian Oersted discovered a relationship between electricity and magnetism. Today, electromagnetism is the basis for devices such as electric motors and electric generators.
The Left (or Right) Hand Rule (03:01)
When electric current flows in a wire there is a region of magnetic force which encircles the wire. The Right-Hand Rule and the Left-Hand Rule describe the direction of this magnetic force.
Electric Coils (02:46)
The potential for a magnetic field surrounding a current-carrying wire to do useful work increases greatly when that wire is bent into a simple coil. Properties and applications of magnetic coils are explored.
Solenoids (02:42)
A solenoid is a tightly-wound helix of current-carrying wire. Properties of solenoids, and their similarities to bar magnets, are examined.
Solenoid Switches (01:28)
One important use of a solenoid is as a mechanical switch which is turned on and off by electricity. The construction, function, and application of solenoids are explored.
Electromagnets (01:27)
Electromagnets are used in many practical everyday applications. The scientific principles which underlie the construction and function of electromagnets are explored.
For additional digital leasing and purchase options contact a media consultant at 800-257-5126
(press option 3) or sales@films.com.