Electrical Telegraphy, Electric Bells and Telephones
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.
- Year: 1931
- Country: Japan
- Genre: Animation
- Studio:
- Keyword:
- Director: Yasuji Murata
- Cast: