Electrical Telegraphy, Electric Bells and Telephones
Electrical Telegraphy, Electric Bells and Telephones
Watch electrical telegraphy, electric bells and telephones Putlocker. 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.