Hawkins Electrical Guide v. 01 (of 10) Questions, Answers, & Illustrations, A progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications

Used for _intermittent work_, where the cell is in service for short periods of time, such as in electric bells, signaling work, and electric gas lighting. If kept in continuous...

The object of the field magnet is to produce an intense magnetic field within which the armature revolves. It is constructed in various forms, due in a large measure to consider...

Static electricity may be defined simply as _electricity at rest_; the term properly applies to an isolated charge of electricity produced by friction. The presence of static el...

In order to adapt the dynamo to the varied conditions of service, its design is modified in numerous ways, giving rise to the different “types.” These may be classified with res...

=Self-induction.=--This is the property of an electric current by virtue of which _it tends to resist any change in its rate of flow_. It is sometimes spoken of as _electromagne...

=Magnetism.=--The ancients applied the word “magnet,” _magnes lapes_, to certain hard black stones which possess the property of attracting small pieces of iron, and as discover...

The term “electric current,” in the present state of our knowledge, should be regarded as denoting the existence of a state of things in which certain definite experimental effe...

A dynamo is a machine for converting mechanical energy into electrical energy, by means of electromagnetic induction, the amount of electric energy thus obtained depending upon...

The word _induction_, introduced by Faraday, has various meanings so far as it relates to electricity. It signifies, in general, phenomena produced in bodies by the influence of...

=How the Dynamo Produces Direct Current: The Commutator.=--The essential difference between an alternator and a dynamo is that the alternator delivers alternating current to the...

The production of electricity is simply a transformation of energy from one form into another, usually mechanical energy is changed into electrical energy and a dynamo is simply...

The ordinary statement that an electric current is flowing along a wire is only a conventional way of expressing the fact that the wire and the space around the wire are in a di...

The practical electrician has to measure electrical resistance, electromotive forces, and the capacities of condensers. Each of these several quantities is measured by compariso...

Bodies differ from each other in a striking manner in the freedom with which the electric current moves upon them. If the electric current be imparted to a certain portion of th...

=Nature and Source of Electricity.=--What is electricity? This is a question that is frequently asked, but has not yet been satisfactorily answered. It is a force, subject to co...

The word dynamo is used to designate a machine which produces _direct current_ as distinguished from the _alternator_ or machine generating an _alternating current_. In a broade...

The induction coil has always been a popular piece of apparatus with those interested in electrical science; the experiments which can be performed with its aid are very numerou...