Electrical Telegraphy, Electric Bells and Telephones
1931•11 min
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.
Director: Yasuji Murata
Where to watch
Not available on streaming in your region.
