Segments in this Video

Generation of Electricity (03:36)


A steady electric current generates a magnetic field around a wire. A wire wound into a coil strengthens the magnet force. Faraday's experiment with the electromagnet is illustrated and explained.

Electricity: Induction and Generator Effect (02:38)

A constant magnet field does not generate an electric current. It is a changing magnetic field that induces an electric current. As long as the magnet field moves in relation to the conductor, electricity is generated--the generator effect.

Electricity Can Do Work (00:46)

The discovery of the battery allowed chemical energy to be converted to a supply of electric current. Electricity could be made to do useful work. This means mechanical devices could convert dynamic energy into electrical energy.

Generator Left Hand Rule (03:18)

The left hand rule is a method to determine the relationship of the motion of the conductor in a magnetic field to the direction of the induced current.

Generator Electromotive Force (02:44)

Electrical pressure, abbreviated emf, is the force that pushes electrons through a conductor; it is measured in volts. It describes the theoretical capability of the generator to do work.

Alternative Current (AC) Generators (03:31)

AC generators produce electric current, usually by rotating a conductor in a magnetic field, thereby generating current through electromagnetic induction. They are used to transform mechanical energy into AC electrical power.

Direct Current (DC) Electric Generation (02:26)

Direct current (DC) generators are rotating electric machines that deliver an unidirectional voltage and current in smaller mechanisms such as car and boat engines.

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Electric Generators

Part of the Series : Electricity: A 3-D Animated Demonstration
DVD (Chaptered) Price: $99.95
DVD + 3-Year Streaming Price: $149.93
3-Year Streaming Price: $99.95



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, as well as the more common alternator as a means of generating DC electricity. Specific modules include Generating Electricity, Inductors, Generator Left-Hand Rule, Generator Electromotive Rule, AC Generators, and DC Generators. Correlates to all National CTE Organizational Standards (including the provisions of the Perkins Act). A viewable/printable instructor’s guide is available online. A Shopware Production. (20 minutes)

Length: 20 minutes

Item#: FMK38730

ISBN: 978-1-4213-8978-3

Copyright date: ©2008

Closed Captioned

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