Electrical Telegraphy, Electric Bells and Telephones

1931, animation

11 minutes

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...

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Japan

Largescale poster for Yasuji Murata

Yasuji Murata

Director

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English

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