Electrical Telegraphy, Electric Bells and Telephones (1931)
11m
Running Time
April 30, 1931Release Date
Electrical Telegraphy, Electric Bells and Telephones (1931)
11m
Running Time
April 30, 1931Release Date
Plot.
When copper wire is wrapped around an iron rod and connected to a battery, it becomes an electromagnet. A science teaching material movie that explains the principle and structure of electric bells and telephones by applying the principle of an electromagnet through a fusion of live action and animation.
Where to Watch.
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Cast & Crew.
Details.
Release DateApril 30, 1931
Original Name電信 電鈴 電話
StatusReleased
Running Time11m
Genres
Last updated:
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