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Page "Electric current" ¶ 39
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For and alternating
For an alternating current arc welder the welding electrode would not be considered an anode or cathode.
For electrical systems which use alternating current the electrodes are the connections from the circuitry to the object to be acted upon by the electric current but are not designated anode or cathode since the direction of flow of the electrons changes periodically, usually many times per second.
: For both of these processes, the energy loss per cycle of alternating current is constant, so core losses increase linearly with frequency.
For a long time, the goal was 3 meetings a year, with 2 in North America and 1 in either Europe or Asia ( alternating between them every other year ).
For instance, the flow around a circular cylinder generates a Kármán vortex street: vortices being shed in an alternating fashion from each side of the cylinder.
For effective degaussing, it is necessary that the magnitude of the alternating magnetic field produced by the degaussing coil decreases smoothly and continuously, rather than sharply switching off or decreasing in steps ; the PTC thermistor accomplishes this naturally as it heats up.
For alternating current electrical power, the universal practice is to specify RMS values of a sinusoidal waveform.
For applications requiring direct current, such as third rail power systems, alternating current is distributed to a substation, which utilizes a rectifier to convert the power to direct current.
In 1911, Westinghouse received the AIEE's Edison Medal " For meritorious achievement in connection with the development of the alternating current system.
For example, prior to storing hydrogen peroxide in an aluminium container, the container can be passivated by rinsing it with a dilute solution of nitric acid and peroxide alternating with deionized water.
For years, she kept alternating her appearances in film with continued performances in vaudeville and when age put an end to the glamour roles, she readily took jobs in television.
For most of its run, The Huntley-Brinkley Report aired only Monday through Friday, but in January 1969, the network expanded it to Saturday evenings, with Huntley and Brinkley working solo on alternating weeks.
For example, furan ( see picture ) is a five-membered ring with two alternating double bonds and an oxygen in position 1.
For alternating current, most ( 63 %) of the electrical current flows between the surface and the skin depth, δ, which depends on the frequency of the current and the electrical and magnetic properties of the conductor.
For the next twenty years, the history of Ulster consists for the most part of alternating conflict and alliance between MacDonnells and O ' Neills, and attempts on the part of the English government to subdue them both.
For example, the oysters in the Apalachicola Bay, Florida, depend on the brackish water mixture of river and ocean water, and the alternating freshwater and saltwater flows that the river and the tides provide.
* For the last 10 seconds of each minute ( seconds 50 to 59 ), the once-per-second tones are again cut to 10 milliseconds each, while CHU transmits a brief voice station identification, followed by voice announcements of the next minute in UTC, alternating between French and English.
For the entrance of the Time & Life Building lobby, he created Two Portals ( 1961 ), a 42-by-14-foot mural of alternating glass bands in white and brown that recede into two bronze centers to create an illusion of depth.
For example, in the case of the symmetric group and alternating group, Schur proved that there is exactly one non-trivial class of Schur multiplier and completely determined all the corresponding irreducible representations.
For example, if G is the infinite cyclic group < x >, and H is the infinite cyclic group < y >, then every element of G ∗ H is an alternating product of powers of x with powers of y.
" He was awarded the IRE Medal of Honor ( 1932 ), now IEEE Medal of Honor, " For his studies of radio propagation phenomena and his contributions to the theory and measurement methods in the alternating current circuit field which now have extensive radio application.
Another example: P being as above, a resolvent R for a group G is a polynomial whose coefficients are polynomials in the coefficients of p, which provides some information on the Galois group of P. More precisely, if R is separable and has a rational root then the Galois group of P is contained in G. For example, if D is the discriminant of P then is a resolvent for the alternating group.
For example, according to this definition, the Chaines turns is an alternating chain of inside of outside turns, although the direction of the rotation is the same.
* For clocks, the gridiron pendulum is developed by John Harrison, as a pendulum that compensates for temperature errors: a grid of alternating brass and steel rods is arranged so that the heat is dissipated.

For and currents
For example, the electric currents in electrolytes are flows of positively and negatively charged ions.
For a small signal analysis, every non-linear element can be linearized around its operation point to obtain the small-signal estimate of the voltages and currents.
For example, in the solar wind together with ionized hydrogen, the particles interact with the Earth's magnetosphere giving rise to Birkeland currents and the aurora.
For instance, all superconductors have exactly zero resistivity to low applied currents when there is no magnetic field present or if the applied field does not exceed a critical value.
For small power and signal transformers, in which currents are low and the potential difference between adjacent turns is small, the coils are often wound from enamelled magnet wire, such as Formvar wire.
For sinusoid currents and voltages at the same frequency, reactive power in vars is the product of the RMS voltage and current, or the apparent power, multiplied by the sine of the phase angle between the voltage and the current.
For this reason, when the human body comes in contact with high power RF currents it can cause superficial but serious burns called RF burns.
For underwater power cables, HVDC avoids the heavy currents required by the cable capacitance.
For centuries, tidal currents had made ocean travel particularly difficult and risky for the boats that were then available, and as such there had been very little, if any, naval contact between the peoples living in these continents.
For a uniformly magnetized cylindrical bar magnet, the net effect of the microscopic bound currents is to make the magnet behave as if there is a macroscopic sheet of electric current flowing around the surface, with local flow direction normal to the cylinder axis.
For example, a diode with a zener breakdown voltage of 3. 2 V will exhibit a voltage drop of very nearly 3. 2 V across a wide range of reverse currents.
For equal collector currents, this drawback translates to an increase in the dissipated power for the Darlington transistor over a single transistor.
For single loop railguns, these mission requirements require launch currents of a few million amperes, so a typical railgun power supply might be designed to deliver a launch current of 5 MA for a few milliseconds.
For example, bearing mounting, temperature, exposure to external environment, lubricant cleanliness and electrical currents through bearings etc.
For output voltages not provided by standard fixed regulators and load currents of less than 7 amperes, commonly available " adjustable " three-terminal linear regulators may be used.
For example, members of the family Porcellanasteridae employ additional sieve-like organs which occur among their lateral plate series and which are thought to generate currents in the burrows made by these infaunal starfish.
For these currents to be induced, the speed of the physical rotor must be lower than that of the stator's rotating magnetic field (), or the magnetic field would not be moving relative to the rotor conductors and no currents would be induced.
For these reasons, in the region very close to currents and charge-separations, the EM field is dominated by electric and magnetic components produced directly by currents and charge-separations, and these effects together produce the EM " near field.
For each logic family, typically a " standard " input is defined by the manufacturer with maximum input currents at each logic level, and the fan-out for an output is computed as the number of these standard inputs that can be driven in the worst case.
" For a finite-size system to persist in time ( to live ), it must evolve in such a way that it provides easier access to the imposed currents that flow through it.
The constructal law was stated by Bejan in 1996 as follows: " For a finite-size system to persist in time ( to live ), it must evolve in such a way that it provides easier access to the imposed currents that flow through it.
For example, some rural installations can offset line losses and charging currents with local solar power, wind power, small hydro or other local generation.

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