CHAPTER V

THE DYNAMO; WHAT IT DOES, AND HOW

Electricity compared to the heat and light of the Sun--The simple dynamo--The amount of electric energy a dynamo will generate--The modern dynamo--Measuring power in terms of electricity--The volt--The ampere--The ohm--The watt and the kilowatt--Ohm's Law of the electric circuit, and some examples of its application--Direct current, and alternating current--Three types of direct-current dynamos: series, shunt, and compound 89