Electrical Telegraphy, Electric Bells and Telephones (1931)
Details
Original Title: 電信 電鈴 電話
Release Date: April 30, 1931
Runtime: 11 minutes
Budget: $0.0
Revenue: $0.0
Overview
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.
Rating
0/5
Local Reviews: 0
TMDB Popularity: 0.06
