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.

In 1906, while working at the National Cash Register company, inventor Charles F. Kettering designed a cash register with an electric motor.

The discoveries of Michael Faraday formed the foundation of electric motor technology.

Michael Faraday formed the foundation of electric motor technology

André-Marie Ampère in 1819-1820 ; Michael Faraday invented the electric motor in 1821, and Georg Ohm mathematically analysed the electrical circuit in 1827.

The electric motor exploits an important effect of electromagnetism: a current through a magnetic field experiences a force at right angles to both the field and current

This relationship between magnetic fields and currents is extremely important, for it led to Michael Faraday's invention of the electric motor in 1821.

In common usage, an engine burns or otherwise consumes fuel, and is differentiated from an electric machine ( i. e., electric motor ) that derives power without changing the composition of matter.

An electric motor uses electrical energy to produce mechanical energy, usually through the interaction of magnetic fields and current-carrying conductors.

By convention, electric engine refers to a railroad electric locomotive, rather than an electric motor.

* Electric vehicle, a vehicle using an electric motor instead of an internal combustion engine

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

Thermal image of an electric motor.

The distributor was driven by falling weights or an electric motor.

The latter was a cabinet in which a continuous loop of Dickson's celluloid film ( powered by an electric motor ) was back lit by an incandescent lamp and seen through a magnifying lens.

# A certain means of wiring an alternating current electrical generator, and AC electric motors, so that when the generator is made to turn at a given speed, or even turned to a certain angle, each motor connected to it will also turn at that speed, or at the same angle.

Dr. Gatling later used examples of the M1893 powered by electric motor and belt to drive the crank.

Some types of brushless DC electric motors use Hall effect sensors to detect the position of the rotor and feed that information to the motor controller.

Many different systems have been used in the past but modern engines are usually started by an electric motor in the small and medium sizes or by compressed air in the large sizes.

In more modern lighthouses, electric lights and motor drives were used, generally powered by diesel electric generators.

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.

It is also possible that the electron has an electric dipole moment, although this has not yet been observed ( see electron electric dipole moment for more information ).

For a longer list, see the List of jazz bassists, which includes both double bass and electric bass players.

* electric field ( see electrostatics ): an especially simple type of electromagnetic field produced by an electric charge even when it is not moving ( i. e., there is no electric current ).

Compare the subtractive colors to the additive colors in the two primary color charts in the article on primary colors to see the distinction between electric colors as reproducible from light on a computer screen ( additive colors ) and the pigment colors reproducible with pigments ( subtractive colors ); the additive colors are a lot brighter because they are produced from light instead of pigment.

# Electric currents or more generally, moving electric charges create magnetic fields ( see Maxwell's Equations ).

If they did exist, both Gauss's law for magnetism and Faraday's law would need to be modified, and the resulting four equations would be fully symmetric under the interchange of electric and magnetic fields ; see magnetic monopoles for details.

The internet enables a way of communication which was impossible to be foreseen in past societies. As McLuhan has written, " In this electric age we see ourselves being translated more and more into the form of information, moving toward the technological extension of consciousness ( McLuhan, 86 ).

Another way to view the statement, " Lightning causes thunder " is to see both lightning and thunder as two perceptions of the same event, viz., an electric discharge that we perceive first visually and then aurally.

Compare the subtractive colors to the additive colors in the two primary color charts in the article on primary colors to see the distinction between electric colors as reproducible from light on a computer screen ( additive colors ) and the pigment colors reproducible with pigments ( subtractive colors ); the additive colors are a lot brighter because they are produced from light instead of pigment.

Hydrogen can be used as a fuel for powering internal combustion engines by combustion or electric motors via hydrogen fuel cells ( see Hydrogen vehicle ).

Some regulators regard electric transmission to be a natural monopoly and there are moves in many countries to separately regulate transmission ( see electricity market ).

Dielectric loss is caused when the insulating material inside the transmission line absorbs energy from the alternating electric field and converts it to heat ( see dielectric heating ).

The gravitational force, spring force, magnetic force ( according to some definitions, see below ) and electric force ( at least in a time-independent magnetic field, see Faraday's law of induction for details ) are examples of conservative forces, while friction and air drag are classical examples of non-conservative forces.

An incandescent light bulb, incandescent lamp or incandescent light globe is an electric light which produces light with a filament wire heated to a high temperature by an electric current through it, until it glows ( see Incandescence ).

The dependence of the current density on the applied electric field is essentially quantum mechanical in nature ; ( see Classical and quantum conductivity.

with the element of path along the integration of electric field vector E. If the applied E field is uniform and oriented along the length of the conductor as shown in the figure, then defining the voltage V in the usual convention of being opposite in direction to the field ( see figure ), and with the understanding that the voltage V is measured differentially across the length of the conductor allowing us to drop the Δ symbol, the above vector equation reduces to the scalar equation:

A drive belt connects the shafts to an electric motor ( see below ) beneath the playing surface, and rotation of the fans creates what many people call a " vibrato " effect ; however in actuality it is a tremolo, i. e. periodic modulation of amplitude, not pitch.

Geophysicists can also provide the electric current themselves ( see induced polarization and electrical resistivity tomography ).

In the Earth's outer core, electric currents in the highly conductive liquid iron create magnetic fields by electromagnetic induction ( see geodynamo ).

Types of electric lighting include:

Types of electric currents

Types of oils that can be used are mineral oil, olive oil or commercial preparation in an electric heater.

Types of contemporary kettles include: stovetop, whistling, and electric and can involve a number of materials such as copper, iron, aluminum, polished chrome, ceramic, and stainless steel.

Most moonroof systems today are electric and have either a combination pop-up / inbuilt or a pop-up / spoiler configuration ( see Sunroof Types below ).