At the + electrode is the - element of H2O, and at the - electrode the + element.
Why does gas collect twice as fast at one electrode as at the other?
Mark the electrode attached to the Zn -, and that attached to the C +; positive electricity at one end of a body commonly implies negative at the other.
The negative electrode resistance must be overcome.
Such a current could not be maintained by the rectifier, because as soon as the zero value was reached the negative electrode resistance of the rectifier would be re-established and the circuit would be broken.
The negativeelectrode resistance will re-establish itself, and stop the operation of the bulb.
The middle iron electrode must hang straight down in the solution and not touch either of the other aluminum alloy electrodes.
In operation~ no current will flow until the starting or negative electrode resistance has been overcome by the ionization of the vapor in its neighborhood.
The rectifier bulb is provided with three positive electrodes or anodes, a negative electrode or cathode, and a starting anode, as shown.
The small starting electrode C is connected to one side of the alternating circuit, through resistance; and by rocking the tube a slight arc is formed, which starts the operation of the rectifier tube.
In the case we have chosen, the solution becomes stronger near the anode, or electrode at which the current enters, and weaker near the cathode, or electrode at which it leaves the solution.
Thus, if the molecule of a substance in solution is represented by AB, Grotthus considered a chain of AB molecules to exist from one electrode to the other.
When an alkaline chloride, say sodium chloride, is electrolysed with one electrode immersed in a porous cell, while caustic soda is formed at the cathode, chlorine is deposited at the anode.
First one and then the other conductor is connected with the electrode of the lower or movable plate, which is moved by the screw until the index attached to the attracted disk shows it to be in the sighted position.
When the ions are set free at the electrodes, they may unite with the substance of the electrode or with some constituent of the solution to form secondary products.
Faraday discovered the existence of a dark space round the negativeelectrode which is usually known as the "Faraday dark space.
At the site of the leg electrode a temperature of over 128 deg.
When the furnace with this well-known regulating device was to be used, say, for the melting of metals or other conductors of electricity, the fragments of metal were placed in the crucible and the positive electrode was brought near them.
Again, Hittorf has shown that the effect of a cyanide round a copper electrode is to combine with the copper ions.
Within a month this plant was making more than a ton a day and gradually increased its capacity until, a few months afterward, it reached its maximum of six tons a day.
The carbon was an electrode in connection with the vibrating diaphragm, and was in a closed circuit through which flowed a battery current.
I had recourse again," says Edison, "to the phenomenon discovered by me some years previous, that the friction of a rubbing electrode passing over a moist chalk surface was varied by electricity.
One day we went down to the roundhouse of the Cincinnati & Indianapolis Railroad and connected up the long wash-tank in the room with the coil, one electrode being connected to earth.
But the luminous patches are constantly changing in position, which is especially well observable if one manages to produce very few, and this indicates that the configuration of the electrode is rapidly changing.
When the gas is at very low pressure, an electrode is heated more because higher speeds can be reached.
The production of a small electrode capable of withstanding enormous temperatures I regard as of the greatest importance in the manufacture of light.
The lower portion of the globe, as far as the socket S reaches, is rendered conducting, either by a tinfoil coating or otherwise, and the external electrode is connected to a terminal of the coil.
An electrode lasts much longer when kept at incandescence by currents, or impulses, obtained from a high-frequency alternator, which rise and fall more or less harmonically, than by impulses obtained from a disruptive discharge coil.
This protection, of course, is a relative one, and it should not be thought that by pushing the incandescence higher the electrode is actually less deteriorated.
If the gas around the electrode is strongly compressed, the displacements, and consequently the speeds, are very small, and the heating is insignificant.
For this purpose it is sufficient to surround a conductingelectrode with a non-conducting material, as, for instance, in the bulb described before in Fig.
Returning to the subject of electrode lamps, it is obviously of advantage in such a lamp to confine as much as possible the heat to the electrode by preventing the circulation of the gas in the bulb.
If a conductor A is placed near a conductor B exposed to ultra-violet light, and if B is made the negative electrode and a difference of potential established between A and B, a current of electricity will flow between the conductors.
In order to produce the saturation current the electric field must be strong enough to drive each ion to the electrodebefore it has time to enter into combination with one of the opposite sign.
In such cases if the electrode at which the ionization occurs is the positive electrode, all the ions will be positively charged, while if it is the negative electrode the ions will all be charged negatively.
Among such cases may be mentioned those where one of the electrodes is raised to incandescence while the other is cold, or when the negativeelectrode is exposed to ultra-violet light.
When the end of the pointed electrode is a hemisphere of radius a, Chattock showed that for the same gas at the same pressure the electric intensity f when discharge takes place is roughly proportioned to a^-0.
The cathode rays start from the electrode C in a highly exhausted tube, pass through two small holes in the plugs A and B, the holes being in the same horizontal line.
If one electrodewas carbon and the other iron, the current when the carbon was cathode and the iron anode was more than 100 times the current when the electrodes were reversed.
If then a piece of carbon were maintained at this temperature by some external means, and used as a cathode, a current could be sent from it to another electrode whether the second electrode were cold or hot.
Chattock showed that with the same pointed electrode the value of the electric intensity at the point was the same whatever the distance of the point from the plane.
It is applied by means of one moistened sponge electrode placed directly over the gall-bladder, and the other on the opposite side of the body and posteriorly.
Let the patient lie upon a bed and apply one pole or electrode to the anus, while the other one is passed with pressure along the course of the large intestine.
In applying the faradic current an electrode is introduced into the rectum, and the other, a sponge well moistened, is placed over the gall-bladder.
Stimulation of muscular contractility by the oesophageal electrode has been recommended, but the prospects of success hardly justify the risks of serious injury in the domain of the pneumogastric nerve.
Some apply the negative electrode to the joints and the positive to the limb higher up.
In addition, the introduction of one insulated electrode into the rectum, while the other is in contact with the abdominal muscles or along the line of the large intestine, has been advised.
A black crystalline substance which forms on the positive electrode of a voltaic arrangement employed to decompose solution of nitrate of silver.
Under these conditions the electric arc was infinitely small, the negative electrode was not consumed, whilst the positive one was incandescent.
The flames were arranged so as to form one electrode of a frictional machine.
If potassium oxalate is added to a solution of the trichloride, the antimony may be readily reduced, but the metal adheres still less firmly to the electrode than it did in the first instance.
Form the bulb Q in the same manner as in the case of L, seal into it the electrode R, and add the tube marked by the dotted lines at F.
The agent, or material in a battery, usually a liquid, which the current passes through in going from one electrode to the other.
An electrode is what we call any piece of metal or wire which is so placed as to let us get at electrons (or ions) to control their motions.
To start with, we shall forget the grid and think of a tube with only a filament and a plate in it--a two-electrode tube.
In the first method currents are sent through the earth from an electrode to another at the sending station.
The measurements of conductivity, joined to certain considerations relating to the differences of concentration which appear round the electrode in electrolysis, allow the speed of the ions to be calculated.
He found that, the greater the distance of the two electrode plates from each, the greater may be, within certain limits, the intensity of the current.
Moreover, if we examine the positive electrode we shall find it slightly eaten away, because the sulphuric acid set free from the sulphate has combined with the particles of that wire to make new sulphate.
Mr. Tesla has found that the deterioration of the electrode is the less, the higher the frequency.
Given, then, an electrode which can withstand to a very high limit the effect of the bombardment and outward strain, it would be safe, no matter how much it was forced beyond that limit.
Any one who begins a study of the problem will be apt to think that what is wanted in a lamp with anelectrode is a very high degree of incandescence of the electrode.
Without much reflection one would think that in pushing so far the incandescence of the electrode it would be instantly volatilized.
In order to reduce the deterioration of the electrode to the minimum, it is desirable that the vibration be harmonic, for any suddenness hastens the process of destruction.
This phenomenon may be easily observed in bulbs provided with a rather large carbon electrode (say, a sphere of six millimetres diameter).
An electrode lasts much longer when kept at incandescence by currents, or impulses, obtained from a high frequency alternator, which rise and fall more or less harmonically, than by impulses obtained from a disruptive discharge coil.
The current enters the electrolyte by an electrode called the anode, or the positive terminal.
The positive terminal is connected to a small iron electrode at one end of the tube.
Hydrogen is given off at the negative electrode, while at the positive electrode the uncharged SO4 radicle reacts with the water present, and oxygen is released.
The electrodeby means of which the the current leaves the electrolyte is termed the cathode, or negative terminal.
A zincelectrode is placed on the pad and connected to the positive pole of the supply.
If, however, the positive electrode is composed of zinc, for example, the chlorine attacking it will form chloride of zinc, a very corrosive material.
A current some fifty milliampères stronger is passed directly through the adhesions; when these are absorbed, the intra-uterine electrode is employed, as in cases that are not complicated with them.
The tissues in the vicinity of each electrode are necessarily affected by the elements brought to them in accordance with chemical laws.
This electrode is always used internally to puncture through the vagina or through the cervical tissue into the tumor; this is not nearly so painful as piercing the abdominal walls, nor does it wound the peritoneum.
After two or three treatments, the forceps are no longer required because the electrode can then be readily introduced into the uterine cavity without them.
It follows that if the positive electrode be composed of metal, it will be corroded by the action of chlorine and the acids, and the negative will remain unacted on and smooth.
This electrode is made from a sheet of lead or copper nine by ten inches and covered with a layer of wet absorbent cotton; it is applied over the abdomen.
When an ordinary electrode of carbon covered with soft sponge is made to conduct a strong galvanic current, the skin speedily becomes reddened, and may be made to ulcerate if the contact is sufficiently prolonged.
The application of the electrical current by means of the uterine electrode is the most modern and effectual method of treating these cases successfully.
Although the negative electrode remains smooth, much more than at the positive are seen these destructive effects from the action of the free alkali liberated in its neighborhood.
This brings the operator's hand into the circuit as the negative electrode or pole.
It will often happen that diseased action is found in parts where the patient was entirely unaware of its existence until the practitioner's fingers or other electrode revealed it.
On its way, it becomes more or less diverted to adjacent nerves; or, if gathered in the healthy part, under the negative pole, it is immediately dispersed by the normal circulation as soon as the electrode is removed.
In treating this case, I will place my negative electrode either on some healthy part, or, if there be perceptible anywhere in the system a morbidly negative part, as is often the case, I will place my negative pole there.
Wet the hair thoroughly through to the scalp, where the electrode is to be applied.
In treating the painful part, pass the electrode more or less also over the nerves adjacent to the one principally affected.
At the instant after his face is in the water, drop into the water the tin electrode P.
The Marie-Davy cell consists of a carbon electrode in a paste of proto-sulphate of mercury and water contained in a porous pot, and a zinc electrode in dilute sulphuric acid, or in sulphate of zinc.
Filaments of deposited metals stretching from electrode (pole) to electrode (pole).
The oxygen of the water is separated at the zinc electrode from the hydrogen, and at the other electrode this hydrogen recombines with the oxygen from the oxide of copper.
The chemical action of this form of Daniell cell is as follows:-- The zinc electrode combines with oxygen; the oxide thus formed combines with sulphuric acid and forms sulphate of zinc.
The rheostat having been previously adjusted to heat the electrode to nearly white heat, the circuit is broken and the electrode introduced cold.
A diffuse telangiectasis, should it require treatment, may be gently touched with a needle-pointed galvanocaustic electrode at a number of sittings.
With a carbonelectrode the voltage will vary from zero to forty-five volts.
The carbon electrodeis usually made from one quarter to one and a half inches in diameter and from six to twelve inches in length.
The metallic arc is called a flaming arc and as the metal of the electrode burns with the heat, it gives the flame a color characteristic of the material being used.
Tubes are placed directly above these wire terminals in the vat, one tube being over each electrode and separated from each other by some distance.
The negative wire is fastened to the carbon electrode and the work is laid on a table made of cast or wrought iron to which the positive wire is made fast.
If a motor generator set with a seventy volt constant potential machine is used for a welder, the cost will be as follows: Metallic electrode 25.
With a machine which will deliver the required voltage at the arc and eliminate all the resistance in series with the arc, the cost will be as follows: Metallic electrode 7.
In all arc welding by the use of the carbon arc, the positive electrode is made the piece to be welded, while in welding with metallic electrodes this may be either the piece to be welded of the rod that is used as a filler.
With the metallic electrode the voltage will vary from zero to thirty volts.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "electrode" in a variety of sentences. We hope that you will now be able to make sentences using this word. Other words: component; device; generator; parts; relay; tube
