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Video Video
TITLE: Direct & alternating current [videorecording].
SERIES: Electricity
PUBLISHED: Princeton, NJ : Films for Human & Sciences, Inc. ; 1987.
DESCRIPTION: 1 videocassette (14 min.) : sd., col. ; 1/2 in.
NOTES: Original copy.
NOTES: Two neon lamps, one connected to a battery and the other connected to an alternating current power source, are employed to demonstrate the difference between direct current (DC) and alternating current (AC). A seleniym rectifier is used to change AC to DC and to set a model car in motion.
SUBJECT: Introductory concepts in physics.

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