Sinopsis
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.
Informasi
- Format
- Film
- Episode
- 1
- Status
- Selesai tayang
- Tayang
- 1 Jan 1931
- Durasi
- 10 mnt
- Sumber
- Orisinal
- Rating usia
- G
- Judul Inggris
- Electrical Telegraphy, Electric Bells and Telephones
- Judul asli
- 電信 電鈴 電話