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Description
This live-action video introduces the basics of electricity. Computer animation adds interest and excitement as the video comes to life in its coverage of atoms, conductors, insulators, free electrons, voltage, current, resistance, magnetism, attraction-repulsion, electromagnets, a simple circuit, and other electrical principles. Ideal for courses in electricity, physics, science, automotive, and technology.
Description
This program explores how electric energy became an essential tool with the advent of electricity storage, allowing the flow of current to do useful work. Conductors and insulators, voltage, and current are defined and examined, using a water flow model to help ensure understanding. The difference between electron flow and current flow models is explained, and the nature of direct and alternating current (both one- and two-phase) is developed. Specific...
Description
This program explores the basic principles behind the operation of AC and DC motors. An explanation is given about how one or more fixed magnets, either permanent or electromagnetic, can cause linear movement or rotation of a current-carrying wire. A hand rule is developed to predict motor force. Motor torque is explained as a prelude to the practical design of a direct current motor. Specific modules include Motors and Magnets, Current and Magnet...
5) Ohm's law
Description
This program investigates the application and limitations of Ohm's Law. Series circuits and parallel circuits are described. Using equivalent resistance, practical exercises are developed in the application of Ohm's Law to series circuits, parallel circuits, and circuits of greater complexity. Specific modules include Ohm's Law, Series Circuits, Series Calculations, Parallel Circuits, Parallel Calculations, and Complex Circuits. Correlates to all...
Description
This program traces the relationship between magnetism and electricity from the first accidental discovery of induced current. The concepts of electric and magnetic fields are introduced and their representation explored. The features of coils and solenoids are examined to develop the construction of practical electromechanical devices such as solenoid switches and electromagnets. Hand rules are introduced to help determine the alignment of currents...
Description
This program defines electric power and explores in general terms a variety of means by which it is produced, transmitted, and consumed. Efficiencies and inefficiencies relating to energy conservation are discussed in relation to power production, transmission, and consumption, with a particular focus on the efficiencies and inefficiencies associated with the conversion of electricity to light. Specific modules include Efficiency I: Power Production;...
Description
This program looks at physics principles behind AC and DC generators. The relationship between a changing magnetic field and the induction of electric current is examined. A hand rule is introduced to predict the generator effect in a linear length of conductor exposed to a changing magnetic field. The behavior of a rotating coil in a magnetic field leads to the practical construction of an AC motor. Split-ring commutator generators are introduced,...
Description
Math in Electrical Technology is an eleven-minute video which is part of the series, Math in Technology. "But why do I need math?" Now, using this series, give students a clear, definitive, and logical answer. Math is necessary to get the job done in most technical fields, including auto mechanics, electricity/electronics, and the building trades. Each video shows real-life problem situations solved by using practical math and actual computations...
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