Electrical Telegraphy, Electric Bells and Telephones

電信 電鈴 電話

• Animation
• 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.

Electrical Telegraphy, Electric Bells and Telephones is a movie first shown in 1931. Runtime is 11 minutes. Status: Released. Genres: Animation. TMDB score 2.0/10 from 1 votes.