電信 電鈴 電話

電信 電鈴 電話 (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.

Fecha de estreno
1931-04-30
TMDB
2.0 / 10 (1)
Duración
11 min
Géneros
Animación
Director
村田安司

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