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.
Description
Type
MovieSeason
1931Status
Finished
Source
OriginalEpisodes
1
Episode Length
10 min
Information Websites
Alternative Names
Romaji
Denshin Denrei Denwa
English
Electrical Telegraphy, Electric Bells and Telephones
Japanese
電信 電鈴 電話