An outline of the difference between alternating and direct current; why AC is in general use; how DC can be produced from AC; and the reasons why one or the other is used for particular purposes. The film also shows why high tension AC is preferable to low tension DC for transmission purposes.
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How to watch
Collection
In ACMI's collection
Credits
Collection metadata
ACMI Identifier
000306
Language
English
Subject categories
Documentary → Documentary films - Great Britain
Educational & Instructional → Instructional
Sound/audio
Sound
Colour
Black and White
Holdings
16mm film; Access Print (Section 1)