Electrical Telegraphy, Electric Bells and Telephones
電信 電鈴 電話
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.
- Format
- Movie
- Episodes
- 1
- Duration
- 10 min
- Status
- Finished
- Season
- 1931
- Score
- 82%