The accumulating determinations of the numerical value of the electromagnetic velocity (v) from the earliest made by Lord Kelvin (Sir W.
The phenomena of light had compelled physicists to postulate a space-filling medium, to which the name ether had been given, and Henry and Faraday had long previously suggested the idea of an electromagnetic medium.
It was an electrostatic and electromagnetic machine combined, driven by an electric current and producing in turn electrostatic charges of electricity.
From these experiments we conclude that the velocity of propagation of an electromagnetic disturbance is equal to the velocity of light, and to the velocity required by Maxwell's theory.
Hutchinson, "On the Electromagnetic Effect of Convection Currents," Phil.
Clerk Maxwell proved that on his theoryelectromagnetic disturbances are propagated as a wave motion through the dielectric, while Lord Kelvin in 1853 (Phil.
Although work had been begun so early in the year, and the road had been operating since May, it was not until July that Edison executed any application for patents on his "electromagnetic railway engine," or his ingenious braking system.
This device not only worked with great rapidity, but was extremely sensitive, and would respond to currents too weak to affect the most delicateelectromagnetic relay.
Later came the magnificent work of Hertz identifying the phenomena as "electromagnetic waves" in the ether, and developing a new world of theory and science based upon them and their production by disruptive discharges.
If the direction of flow of current be reversed, by reversing the battery, the electromagnetic polarity also reverses and the end of the permanent magnet swings over to the other side.
In America, in 1840, Morse had taken out his first patent on an electromagnetic telegraph, the principle of which is dominating in the art to this day.
It includes electromagnetic radiation ranging from radio waves, infrared heat waves, visible light, ultraviolet light, and X rays to gamma rays.
However, I soon saw that the electromagnetic effect was related, not to the pile, but to the simple circuit, and I was thereby led to perform the experiment with much greater sensitivity.
The two wire patterns shown are noted as simply "forms of spiral for increasing the electromagnetic intensity.
The principle of the electromagnetic generation of an E.
The overload release is an electromagnetic circuit breaker that opens the circuit if the motor become greatly overloaded.
The basic principles of electromagnetic induction were given in chapter X, from which, for instance, the distribution of current in the gramme ring armature, shown in fig.
The inductors are held more firmly in place to resist stresses due to electromagnetic drag and centrifugal force; 2.
In accordance with the laws of electromagnetic induction, if the bipolar ring armature shown in fig.
The effect produced by the armature reaction is in accordance with Lenz's law which states that: In electromagnetic induction, the direction of the induced current is such as to oppose the motion producing it.
The teeth stamped in the core discs are made in various shapes, depending largely on the method of securing the inductors in the slots against electromagnetic drag and centrifugal force.
Inventor of theelectromagnetic recording telegraph and of the dot and dash alphabet.
At these frequencies, the three centimeter band of the electromagnetic spectrum, energy does not flow on wires as it does in the lower frequency regions.
In order to have matter, which I believe to be a form of electromagnetic field in stasis, one must have special properties which make the existence of matter possible.
In order to have an electromagnetic wave, one must have a medium in which an electric field or a magnetic field may exist.
This was the first meeting of a committee that was destined to accomplish much in the electric and electromagnetic field; it was the initial impulse of a movement that brought renown to the entire body of English electricians.
The step to magnetic phenomena was comparatively simple; but it was otherwise as regards electromagnetic phenomena, where current electricity is essentially involved.
Whatever Romagnosi thought of his experiment and its theoretical bearing, the attraction and subsequent repulsion of the compass-needle which he said he observed were electrostatic and not electromagnetic effects.
It is clear, then, that the International Committee which selected the term coulomb for the electromagnetic unit of electrical quantity gave honor where it was eminently due.
Unlike the electrostatic effect of his fellow-countryman Romagnosi, this was unquestionably an electromagnetic effect, the first link in the long chain connecting electricity with magnetism.
Its operation depends upon the principle of the well known electro-dynamometer, in which the electromagnetic action between the currents in the field coils and an armature produces motion in the latter.
Electromagnetic waves set up in and transmitted by and through the ether.
Waves transmitted by, in and through the ether, or electromagnetic waves, or electric waves for short.
Thus through the efforts of a great number of workers the idea of utilizing electromagnetic energy for the purposes of the practical worker came to be a reality.
The electromagnetic form has been rendered even more familiar in recent times by the dynamo.
Finally, Clerk-Maxwell developed his wonderful electromagnetic theory, according to which waves of light are of electrical origin.
His discovery of electromagnetic induction in 1831 for the first time made possible the electric dynamo, although still another generation passed before this invention took practical form.
The writer attached to the recording lever of this instrument is maintained by electromagnetic means in a state of to-and-fro vibration.
On the completion of the electromagnetic circuit, the armature A is attracted, the recording glass plate being thereby moved to the left making contact with the writer.
M, M′ are the two electromagnetic coils, the free ends of the horseshoe being pointed.
By an electromagnetic arrangement the holder of the smoked glass plate is made to oscillate to and fro, causing periodic contact with the writer.
The form of Maxwell's equations shows thatelectromagnetic action can be propagated in waves with a definite velocity, which depends on the specific inductive capacity and the magnetic permeability of the medium.
Elastic solid theories, however, have fallen into the background before the advancing popularity of the electromagnetic theory of James Clerk Maxwell.
FARAD, the practical unit of capacity for electricity, in the electromagnetic system of units.
Planck, by reasoning founded on the electromagnetic character of the waves, derived such a relation, but both his reasoning and his results are a little too complicated to be introduced here.
This rapid alternation of the electric field will send out electromagnetic waves which die down as the oscillations decrease.
As the surgings are all up and down AB, the electric vibrations in the electromagnetic waves sent out {87} will all be parallel to AB, and therefore they will be polarised.
It is then proposed to show how electromagnetic waves have been produced by straightforward electrical means and how their wave-lengths have been measured.
In the attempt to explain the nature of an electromagnetic wave (pp.
But the detectors we employ to detect those frequencies we term 'light' are not similar to those we use for the longer frequencies of radio, even though both are electromagnetic waves.
Granting that it takes light one hundred and forty years to cross between here and Neosol, I suggest that the entire galaxy has been coupled by electromagnetic waves for two thousand million years.
The basis of Grayson's Principle is that the Z-wave will not propagate between points that have not previously been linked by electromagnetic waves!
In the receiver these variations are utilized by electromagneticdevices and levers to move a pen as the pencil moves.
Zeeman, a Dutch physicist, and regarded as an important confirmation of the electromagnetic theory of light.
As discussed in section II, photon power derived from the ejection of electromagnetic rays may someday prove a source for accelerating vehicles once they have escaped from Earth's gravity.
Sending forth electromagnetic waves it massed and directed the atmospheric pressure, sending heat waves here, cold ones there, thus causing droughts and rainfall at will.
There is no apparent difference in the wire, yet each particle of steel undergoes an electromagnetic transformation by which the sound is indelibly imprinted on it.
The dynamo is a machine for converting mechanical energy into an electric current, throughelectromagnetic induction.
A violent flash occurs, if the stoppage is sudden enough, a flash which means the bursting of the insulating air partition by the accumulated electromagnetic momentum.
Briefly we may say that nearly allelectromagnetic experiments illustrate the fact of etherial inertia.
This is the basis of the modern electromagnetic theory of light.
Light is an electromagnetic disturbance of the ether.
Faraday conjectured that the same medium which is concerned in the propagation of light might also be the agent in electromagnetic phenomena.
These electromagnetic waves in space have been known on the side of theory ever since 1865, but interest in them was immensely quickened by the discovery of a receiver or detector for them.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "electromagnetic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
