Denshin Denrei Denwa
English title: Electrical Telegraphy, Electric Bells and Telephones
Japanese title: 電信 電鈴 電話
Type: Movie
Source: Original
Episodes: 1
Status: Finished Airing
Aired: 1931
Duration: 10 min
Rating: G - All Ages
Themes: Educational
Demographics: Kids

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.