Electrical Telegraphy, Electric Bells and Telephones (1931)

11m
Running Time

April 30, 1931
Release Date

Electrical Telegraphy, Electric Bells and Telephones

Electrical Telegraphy, Electric Bells and Telephones (1931)

11m
Running Time

April 30, 1931
Release Date

External Links & Social Media

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.

No streaming offers found

Details.

Release Date
April 30, 1931

Original Name
電信 電鈴 電話

Status
Released

Running Time
11m

Genres

Last updated:

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