Electrical Telegraphy, Electric Bells and Telephones (1931)
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.
- Release Date: 1931-04-30
- Runtime: 0h 11min
- Production Country: Japan
- Director: Yasuji Murata