Item Details

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Format
Video; Streaming Video; Online
Summary
The program introduces electric current and voltage and measures these in series and parallel circuits. An experiment to measure resistance is demonstrated and results are shown graphically. Resistance is introduced and calculated from the gradient of V–I graphs. Ohm’s Law is discussed and the V–I graph for a light bulb is plotted. Resistance is shown to depend on the type of metal, the length of a wire, the thickness of a wire and on the temperature, concluding with a demonstration of a superconductor. Animations of positive ions and free electrons explain the observed behaviour.
Release Date
2004
Run Time
24 min.
Language
In English
Notes
  • In Process Record.
  • Title from title frames.
  • Film
Published
Benchmark Media, 2004.
[San Francisco, California, USA] : Kanopy Streaming, 2016.
Recording Info
Originally produced by Benchmark Media in 2004.
Publisher no.
1188718 Kanopy
Related Resources
Cover Image
Description
1 online resource (streaming video file) (24 minutes): digital, .flv file, sound
Mode of access: World Wide Web.
Technical Details
  • Staff View

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    a| Originally produced by Benchmark Media in 2004.
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    a| The program introduces electric current and voltage and measures these in series and parallel circuits. An experiment to measure resistance is demonstrated and results are shown graphically. Resistance is introduced and calculated from the gradient of V–I graphs. Ohm’s Law is discussed and the V–I graph for a light bulb is plotted. Resistance is shown to depend on the type of metal, the length of a wire, the thickness of a wire and on the temperature, concluding with a demonstration of a superconductor. Animations of positive ions and free electrons explain the observed behaviour.
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