Denshin Denrei Denwa
Electric Bells and Telephones ／ Electrical Telegraphy ／ Electrical Telegraphy, Electric Bells and Telephones ／ 電信 電鈴 電話
Description
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.