It poured out of him like an electric current, a feeling that the muscles and nerves of his fine-drawn body were coiling for action, and that that action would be all that he anticipated.

He devised a detonating fuse in which a short wire was caused to glow by an electric current.

It was with the assistance of one of the members of this expedition, Lauritz Esmarch, that Oersted succeeded in producing light by creating an electric discharge in mercury vapor through which an electric current was made to flow.

For a time following the abandonment of the local plant, electric current for Manchester was brought in from the south with an emergency tie-in with the Vermont Marble Company system to the north.

The ampere ( SI unit symbol: A ), often shortened to amp, is the SI unit of electric current ( quantity symbol: I, i ) and is one of the seven SI base units.

Ampère's force law states that there is an attractive or repulsive force between two parallel wires carrying an electric current.

Category: Units of electric current

The SI unit of measurement of electric current, the ampere, is named after him.

In September of 1820, Ampère ’ s friend and eventual eulogist François Arago showed the members of the French Academy of Sciences the surprising discovery of Danish physicist Hans Christian Ørsted that a magnetic needle is deflected by an adjacent electric current.

In 1800, as the result of a professional disagreement over the galvanic response advocated by Galvani, he invented the voltaic pile, an early electric battery, which produced a steady electric current.

An anode is an electrode through which electric current flows into a polarized electrical device.

The direction of electric current is, by convention, opposite to the direction of electron flow.

In fact anode polarity depends on the device type, and sometimes even in which mode it operates, as per the above electric current direction-based universal definition.

* In a cathode ray tube, it is the positive terminal where electrons flow out of the device, i. e., where positive electric current flows in.

In that paper Faraday explained that when an electrolytic cell is oriented so that electric current traverses the " decomposing body " ( electrolyte ) in a direction " from East to West, or, which will strengthen this help to the memory, that in which the sun appears to move ", the anode is where the current enters the electrolyte, on the East side: " ano upwards, odos a way ; the way which the sun rises " (, reprinted in ).

An ammeter is a measuring instrument used to measure the electric current in a circuit.

The relation between electric current, magnetic fields and physical forces was first noted by Hans Christian Ørsted who, in 1820, observed a compass needle was deflected from pointing North when a current flowed in an adjacent wire.

Earth batteries tap electric currents in the earth called telluric current.

By channeling a large electric current through the compressed carbon granules in the microphone, a small sound signal could produce a much larger electric signal.

In 1808 Davy observed that electric current sent through a solution of borates produced a brown precipitate on one of the electrodes.

The giant electric signs and marquees were lit up for the first time since blackout regulations had been instituted, and the atmosphere was alive with the feeling that victory was just around the corner.

The plant was located west of the Battenkill and south of the location of the former electric light plant.

On June 14, 1900 the Manchester Journal reported that an electrical engineer was installing an electric light plant for Edward S. Isham at `` Ormsby Hill ''.

In November 1900 surveying was done under John Marsden on the east mountains to ascertain if it would be possible to get sufficient water and fall to operate an electric power plant.

I couldn't see him, but the electric bugging device gave steady beeps when it was straight ahead, short half beeps when the car I was following was to the left, and long drawn-out beeps when it turned to the right.

The corridor on the eleventh floor was dimly lighted by electric globes at intervals of thirty feet.

Presently they had to give up running the furnace at full capacity and depend on the old coal range in the kitchen, which had never been removed when the new gas range was installed, and the fireplaces and an electric heater in Grandma's room.

Its modern development was initiated in the 1970s when it adds a modern instrumentation to the image of the electric guitar, synthesizer and drums.

Electric street lighting was introduced in 1900 and electric trams were transporting passengers in 1909.

* From the Meiji to the Shōwa period, as the electric railway improved transport to Akihabara and the surrounds, and especially due to the growth in dealerships, the district was designated as a.

After the completion of the Plovdiv-Dimitrovgrad high-speed line on 1 July 2012 the top operating speed was raised to 200 km / h and the national top speed record of 197 km / h set between Iskar and Elin Pelin with a leased Siemens Taurus electric locomotive is soon expected to be broken.

In early 1964, Benny and Christina joined a group with the odd name " Elverkets Spelmanslag " (" The Electricity Board Folk Music Group "), who by no means was a folk music ensemble: the name was a punning reference to their electric instruments.

" This " split pickup ", introduced in 1957, appears to have been two mandolin pickups ( Fender was marketing a four string solid body electric mandolin at the time ).

In field ion and atom probe methods, the polarity of the electric field is reversed, with a high positive field applied to the sample.

Even with no external electric field applied, these electrons move about randomly due to thermal energy but, on average, there is zero net current within the metal.

When a metal wire is subjected to electric force applied on its opposite ends, these free electrons rush in the direction of the force, thus forming what we call an electric current.

However, once the applied electric field approaches the breakdown value, free electrons become sufficiently accelerated by the electric field to create additional free electrons by colliding, and ionizing, neutral gas atoms or molecules in a process called avalanche breakdown.

High speed beams of cathode rays can also be steered and manipulated by electric fields created by additional metal plates in the tube to which voltage is applied, or magnetic fields created by coils of wire ( electromagnets ).

Its name comes from the information path in the system: process inputs ( e. g., voltage applied to an electric motor ) have an effect on the process outputs ( e. g., speed or torque of the motor ), which is measured with sensors and processed by the controller ; the result ( the control signal ) is " fed back " as input to the process, closing the loop.

The resulting torque will tend to align the dipole with the applied field, which in the case of an electric dipole, yields a potential energy of

** Dielectric dispersion, the dependence of the permittivity of a dielectric material on the frequency of an applied electric field

The source of Einstein's proposal that light was composed of particles ( or could act as particles in some circumstances ) was an experimental anomaly not explained by the wave theory was the photoelectric effect, by which light striking a metal surface ejected electrons from the surface, causing an electric current to flow across an applied voltage.

Possibly the earliest and nearest approach to the discovery of the identity of lightning, and electricity from any other source, is to be attributed to the Arabs, who before the 15th century had the Arabic word for lightning ( raad ) applied to the electric ray.

Thus, this law can be applied to generate a magnetic field and run an electric motor.

In PEF processing, a substance is placed between two electrodes, then the pulsed electric field is applied.

Gels suppress the thermal convection caused by application of the electric field, and can also act as a sieving medium, retarding the passage of molecules ; gels can also simply serve to maintain the finished separation, so that a post electrophoresis stain can be applied.

When the electric current is applied, the larger molecules move more slowly through the gel while the smaller molecules move faster.

The Hall coefficient is defined as the ratio of the induced electric field to the product of the current density and the applied magnetic field.

When the electric field applied across an insulating substance exceeds in any location the threshold breakdown field for that substance, the insulator suddenly becomes a conductor, causing a large increase in current, an electric arc through the substance.

Before an electric field is applied, the orientation of the liquid crystal molecules is determined by the alignment at the surfaces of electrodes.

If an electric field of one particular polarity is applied for a long period of time, this ionic material is attracted to the surfaces and degrades the device performance.

This is avoided either by applying an alternating current or by reversing the polarity of the electric field as the device is addressed ( the response of the liquid crystal layer is identical, regardless of the polarity of the applied field ).

When voltage is applied, the liquid crystals shift to a tilted position allowing light to pass through and create a gray-scale display depending on the amount of tilt generated by the electric field.

When physical chemist Richard Williams applied an electric field to a thin layer of a nematic liquid crystal at 125 ° C, he observed the formation of a regular pattern that he called domains ( now known as Williams Domains ).

However some techniques, such as the use of boundaries or an applied electric field, can be used to enforce a single ordered domain in a macroscopic liquid crystal sample.