Electrical Telegraphy, Electric Bells and Telephones streaming HD
1371 views •
11m
3.8 stars
Genre: Animation,
Runtime:11 min •
HD •
0.6
Release add: 1931-04-30
Production:
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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.