First Steps in Electricity; Designed for the Entertainment And Instruction of Young People At Home And in School

Cover First Steps in Electricity; Designed for the Entertainment And Instruction of Young People At Home And in School
First Steps in Electricity; Designed for the Entertainment And Instruction of Young People At Home And in School
Charles Barnard
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XIV. shows just how the whole affair works.
We have here a current of electricity flowing round an iron bar and insulated from it. The effect is therefore caused by induction. It is an induced magnet and as it is given this property by electricity it is called an electro-magnet We have used a small battery, a little insulated wire and an iron key, and yet with these sim- Digitized by Google THE ELECTRO-MAGNET. 97 pie things we have made the most remarkable and per- haps the most useful tool eve
...r invented.
The electro-magnet is now as common as the plough, the sewing-machine, the loom, or printing-press, and like these great tools it has entered into our daily life No. XIV.
and business and marks one of the great steps of human progress. As electricity can in this simple manner be used to make an electro-magnet, the mag- netism displayed by the soft iron while it is affected by the current has naturally received the name of electro- 7 Digitized by Google 98 FIRST STEPS IN ELECTRICITY.
magnetism.


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