A switch-board; a board on which is mounted a number of switches.
The computation of work equal to the exertion of one kilowatt in one hour.
A bar of a blade-like form, adapted to move down between two fingers, and thus establish metallic connections.
Made up of thin plates of the same material, laid together, but not insulated from each other.
A lamp with a filament heated up to a glow by the action of an electric current. The filament is within a vacuum in a glass globe.
Loss of electrical energy through a fault in wiring, or in using bare wires.
The ampere current delivered by a dynamo under certain conditions.
A current in which the vibrations are of few alternations per second.
A metallic substance which has power to attract iron and steel.
A straight piece of metal.
A coil of wire, insulated, surrounding a core of iron, to receive a current of electricity.
A bar of iron adapted to receive a winding of wire.
A magnet in a dynamo. A motor to produce electric energy.
A short steel form, to hold magnetism for a long time.
The adherence of particles to the poles of a magnet.
That quality of a metal which draws metals. Also the pulling action of unlike poles for each other, and pushing away of like poles when brought together.
The action exercised by a magnet of attracting or repelling.
The earth has North and South magnetic poles. The south pole of a magnetic needle is attracted so it points to the north magnetic pole; and the north pole of the needle is attracted to point to the south magnetic pole.
A permanent magnet and a revolving armature for generating a current.
The final voltage after charging.
Invisible particles made up of two or more atoms of different matter. An atom is a particle of one substance only.
An electric instrument designed to make a clicking sound, when the armature is drawn down by a magnet.