A moving coil meter indicates the average of any varying current through it, which is zero for AC.

As the magnetism varies, that creates AC in the coil, which becomes one of the frequencies used in harmonic synthesis.

File: Tesla3. jpg | Nikola Tesla ( 1856-1943 ): developer of modern alternating current ( AC ) flow, improved on the dynamo, patents and theoretical work formed the basis of wireless communication and the radio, transformer and electric bulb and invented the Tesla coil.

If the coil is designed to be energized with alternating current ( AC ), a small copper " shading ring " can be crimped to the end of the solenoid, creating a small out-of-phase current which increases the minimum pull on the armature during the AC cycle.

The heat loads that must be removed by the cooling system include conduction through the support system, radiation from warmer to colder surfaces, AC losses in the conductor ( during charge and discharge ), and losses from the cold – to-warm power leads that connect the cold coil to the power conditioning system.

Exchange operation soon resulted in telephones being equipped with a bell in a ringer box, first operated over a second wire, and later over the same wire, but with a condenser ( capacitor ) in series with the bell coil to allow the AC ringer signal through while still blocking DC ( keeping the phone " on hook ").

Measurement of AC voltage requires a rectifier in the circuit so that the coil deflects in only one direction.

At the power station, an electrical generator converts mechanical power into a set of three AC electric currents, one from each coil ( or winding ) of the generator.

AC ripple in the current was attenuated by the action of passing through the choke coil.

However, AC line frequencies tended to modulate the audio signal going to the voice coil and added to the audible hum.

High-pass filters are also used for AC coupling at the inputs of many audio amplifiers, for preventing the amplification of DC currents which may harm the amplifier, rob the amplifier of headroom, and generate waste heat at the loudspeakers voice coil.

A two axis magnetic search coil antenna measured AC magnetic fields.

* Nikola Tesla was famous for developing the AC motor, the bifilar coil, various devices that used rotating magnetic fields, the alternating current polyphase power distribution systems, the fundamental devices of systems of wireless communication ( legal priority for the invention of radio ), radio frequency oscillators, devices for voltage magnification by standing waves, robotics, logic gates for secure radio frequency communications, devices for x-rays, apparatus for ozone generation, devices for ionized gases, devices for high field emission, devices for charged particle beams, methods for providing extremely low level of resistance to the passage of electrical current, means for increasing the intensity of electrical oscillations, voltage multiplication circuitry, devices for high voltage discharges, devices for lightning protection and VTOL aircraft.

Spring-retracted non-gravitational governors are commonly used in single phase alternating current ( AC ) induction motors to turn off the starting field coil when the motor's rotational speed is high enough.

With the combined help of Ford ’ s computers and the experience of the AC engineers, the new MKIII was born with main tubes instead of for the chassis, huge cross-braced shock towers and coil springs all around.

This is from a special connection called an " AC tap " which is a connection to one of the stator's coil output, before the rectifier.

A Rogowski coil, named after Walter Rogowski, is an electrical device for measuring alternating current ( AC ) or high speed current pulses.

AC Cars kept producing the coil spring AC Roadster with narrow fenders, a small block Ford 289 and called the car the AC 289.

The AC Frua was built on a stretched Cobra 427 MK III coil spring chassis using a very angular steel body designed and built by Pietro Frua.

The term ' induction coil ' is also used for a coil carrying high-frequency alternating current ( AC ), producing eddy currents to heat objects placed in the interior of the coil, in induction heating or zone melting equipment.

Susceptibility of electronic equipment to these other power disturbances is defined by other aspects of the system design, either inside the equipment itself or externally by means such as a UPS, a voltage regulator or a surge protector with built-in overvoltage protection ( which typically consists of a voltage-sensing circuit and a relay for disconnecting the AC input when the voltage reaches a danger threshold ).

The coil of the F relay is designed to be insensitive to AC and will only activate with a direct current.

BA's smooth / urban AC format remained for a period of time without local broadcasters on 106. 9's HD Radio HD2 subchannel, which has since been replaced with an HD relay of sister AM station WJYI, which has a Christian / brokered programming format.

The medial geniculate nucleus ( MGN ) or medial geniculate body ( MGB ) is part of the auditory thalamus and represents the thalamic relay between the inferior colliculus ( IC ) and the auditory cortex ( AC ).

The debate is interesting enough, however, that it is considered of note when a theorem in ZFC ( ZF plus AC ) is logically equivalent ( with just the ZF axioms ) to the axiom of choice, and mathematicians look for results that require the axiom of choice to be false, though this type of deduction is less common than the type which requires the axiom of choice to be true.

Assuming ZF is consistent, Paul Cohen employed the technique of forcing, developed for this purpose, to show that the axiom of choice itself is not a theorem of ZF by constructing a much more complex model which satisfies ZF ¬ C ( ZF with the negation of AC added as axiom ) and thus showing that ZF ¬ C is consistent.

Note that strengthened negations may be compatible with weakened forms of AC.

Adenylate cyclase (, also known as adenylyl cyclase, adenyl cyclase or AC ) is an enzyme with key regulatory roles in nearly all cells.

These are the smallest of the AC enzyme classes ; the AC-IV from Yersinia is a dimer of 19 kDa subunits with no known regulatory components.

The album was a multi-platinum success and produced the pop hit " Lucky One " ( No. 18 pop and No. 2 AC ; No. 1 on Radio & Records ) as well as the title track ( a duet with country music star and future husband Vince Gill ) ( No. 37 pop ) and a cover of Joni Mitchell's frequently covered " Big Yellow Taxi " ( No. 67 pop ) ( in which she changed the line " And they charged the people a dollar and a half just to see em " to " And then they charged the people 25 bucks just to see em ").

Within 2 weeks of the Golden Gate Yacht Club winning the America's Cup, Alameda city council with local support sent a unanimous letter of support to hold AC 34 in San Francisco Bay Area.

Butt-Head also wears a gray AC / DC shirt with red shorts.

There is a total of, ( double track ( as of 1998 )), of which are electrified, mainly at 3, 000 volts DC but with at 25 kV 50 Hz AC ( 2004 ) and all on standard gauge of.

Electrification is at 3 kV DC, with the exception of the new high-speed lines, and of two recently electrified lines in the south of the country which are at 25 kV AC.

The electronic calculators of the mid-1960s were large and heavy desktop machines due to their use of hundreds of transistors on several circuit boards with a large power consumption that required an AC power supply.

For Atlanta, a new GM Goodwrench scheme was introduced, with angled red stripes and a thin blue pinstripe, resembling the Childress AC Delco Chevrolets driven in the Busch Series.

It is the responsibility of the Loader to manage the inventory of film and communicate with the 1st AC on the film usage and remaining stock throughout the day.

On small production crews, this job is often combined with the 2nd AC.

He played as a sweeper and spent his entire career with Serie A club AC Milan.

In later years, a Mugen-Honda V8 became the thing to have, eclipsing the DFV ; Cosworth responded with the brand new AC engine.

A few successful remixes of the song during the 1990s and 2000s along with new versions of the song by Lonnie Gordon, Diana Ross, Chantay Savage, rock group Cake and others as well as constant recurrent airplay on nearly all Soft AC and Rhythmic format radio stations have helped to keep the song in the mainstream.

" The sovereign will also hold an audience with the appointee and will at that time induct the governor-designate into the Order of Australia as Companions ( AC ).

Mathers, however, is generally credited with the design of the curriculum and rituals of the Second Order, which he called the Rosae Rubae et Aureae Crucis (" Ruby Rose and Golden Cross " or the RR et AC ).

Still an amateur team, Hellas merged with two city rivals, Bentegodi and Scaligera, to form AC Verona.

After first being promoted to Serie A for one season in 1957 – 58, in 1959 the team merged with another city rival ( called Hellas ) and commemorated its beginnings by changing its name to Hellas Verona AC.

In 1893 in Paris Charles Brown assisted Jean Heilmann in evaluating AC and DC transmission systems for Fusée Electrique, a steam locomotive with electric transmission, and using this knowledge he designed a three-phase AC electric locomotive for Oerlikon, Zurich.

This set-up uses a normal op-amp with an additional AC amplifier that goes alongside the op-amp.

Equipped with manual steering, manual windows and door locks, sunroof delete, radio delete, AC delete, cruise delete, passenger side door mirror delete, wider 15x7 phone dial alloys for the rear while retaining 15x6 in front, and the M030 package which included stiffer springs and Koni shocks.