Electrical Telegraphy, Electric Bells and Telephones poster
Electrical Telegraphy, Electric Bells and Telephones poster

Electrical Telegraphy, Electric Bells and Telephones

1931 11m 2Movie
Animation

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.

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