Historically this quantity has also been called "tension" and "pressure". Pressure is now obsolete but tension is still used, for example within the phrase "high tension" (HT) which is commonly used in thermionic valve (vacuum tube) based electronics.
Voltage is defined so that negatively-charged objects are pulled towards higher voltages, while positively-charged objects are pulled towards lower voltages. Therefore, the conventional current in a wire or resistor always flows from higher voltage to lower voltage. Current can flow from lower voltage to higher voltage, but only when a source of energy is present to "push" it against the opposing electric field. For example, inside a battery, chemical reactions inside the battery provide the energy needed for current to flow from the negative terminal to the positive terminal.
A simple analogy for an electric circuit is water flowing in a closed circuit of pipework, driven by a mechanical pump. This can be called a water circuit. Potential difference between two points corresponds to the water pressure difference between two points. If there is a water pressure difference between two points (due to the pump), then water flowing from the first point to the second will be able to do work, such as driving a turbine. In a similar way, work can be done by the electric current driven by the potential difference due to an electric battery: for example, the current generated by an automobile battery can drive the starter motor in an automobile. If the pump isn't working, it produces no pressure difference, and the turbine will not rotate. Equally, if the automobile's battery is flat, then it will not turn the starter motor.
This water flow analogy is a useful way of understanding several electrical concepts. In such a system, the work done to move water is equal to the pressure multiplied by the volume of water moved. Similarly, in an electrical circuit, the work done to move electrons or other charge-carriers is equal to "electrical pressure" (an old term for voltage) multiplied by the quantity of electrical charge moved. Voltage is a convenient way of measuring the ability to do work. In relation to "flow", the larger the "pressure difference" between two points (potential difference or water pressure difference) the greater the flow between them (either electric current or water flow).
A common use of the term "voltage" is in describing the voltage dropped across an electrical device (such as a resistor). The voltage drop across the device can be understood as the difference between measurements at each terminal of the device with respect to a common reference point (or ground). The voltage drop is the difference between the two readings. Two points in an electric circuit that are connected by an ideal conductor without resistance and not within a changing magnetic field, have a voltage of zero. Any two points with the same potential may be connected by a conductor and no current will flow between them.
When talking about alternating current (AC) there is a difference between instantaneous voltage and average voltage. Instantaneous voltages can be added for direct current (DC) and AC, but average voltages can be meaningfully added only when they apply to signals that all have the same frequency and phase.
Category:Electromagnetism Category:Electrical systems Category:Physical quantities
ar:جهد كهربائي az:Gərginlik (elektrik) zh-min-nan:Tiān-ap be:Электрычнае напружанне be-x-old:Напруга bs:Električni napon bg:Електрическо напрежение ca:Diferència de potencial cs:Elektrické napětí cy:Foltedd da:Elektrisk spænding de:Elektrische Spannung et:Pinge (elekter) el:Διαφορά δυναμικού es:Tensión (electricidad) eo:Elektra tensio ext:Tensión fa:ولتاژ fr:Tension électrique gl:Tensión eléctrica ko:전압 hr:Napon id:Tegangan listrik is:Rafspenna it:Tensione elettrica he:מתח חשמלי kk:Кернеу la:Tensio electrica lv:Spriegums lt:Elektrinė įtampa hu:Elektromos feszültség mk:Напон ml:വോൾട്ടത mr:विद्युतदाब ms:Voltan nl:Elektrische spanning ja:電圧 no:Elektrisk spenning nn:Elektrisk spenning pl:Napięcie elektryczne pt:Tensão elétrica ro:Tensiune electrică qu:Pinchikilla mast'ay ru:Электрическое напряжение sco:Voltage simple:Voltage sk:Elektrické napätie sl:Električna napetost sr:Електрични напон sh:Električni napon fi:Jännite sv:Elektrisk spänning tl:Boltahe ta:மின்னழுத்தம் th:ความต่างศักย์ tr:Gerilim (elektrik) uk:Напруга ur:وولٹیج wo:Dendu mbëj zh:電壓This text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
Name | Mickey Factz |
---|---|
Birth name | Mickey Williams Jr. |
Birth date | July 13, 1985 |
Hometown | Bronx, NY |
Background | solo_singer |
Genre | Hip hop, alternative, electronic |
Label | GFC New York/Conglomerate Records/Battery Records/Jive |
Occupation | Rapper, Producer, Songwriter, Singer |
Instruments | Vocals |
Years active | 2005–present |
Management | innertec |
Website | MickeyFactz.com }} |
;Official mixtapes
Year | Song | Director(s) |
"Rockin N Rollin feat. The Cool Kids" | Cheeba | |
"Alpha" | Kwesi James | |
"Paradise" | Phil The God | |
"Ex-Girl w/ Emilio Rojas" | Derek Pike | |
"Paradise" | Phil The God | |
Category:Living people Category:1985 births Category:Rappers from New York City Category:People from the Bronx
pl:Mickey FactzThis text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
Name | B.o.B|image B.o.B. performing.jpg |
---|---|
Background | solo_singer |
Birth name | Bobby Ray Simmons, Jr. |
Alias | B.O.B |
Born | November 15, 1988 Winston-Salem, North Carolina, United States |
Origin | Decatur, Georgia, USA |
Instrument | Vocals, guitar, piano |
Genre | Alternative hip hop, Pop rap |
Occupation | Rapper, singer-songwriter, record producer, guitarist |
Years active | 2007–present |
Label | Grand Hustle, Rebel Rock, Atlantic |
Associated acts | Charles Hamilton, Asher Roth, T.I., Playboy Tre, Lupe Fiasco |
Website | bobatl.com |
Notable instruments | }} |
The same year, he appeared on the cover of XXL magazine along with Asher Roth, Charles Hamilton, and Wale as "Hip-Hop's Class of '09". In October 2008, B.o.B was featured on the cover of Vibe along with some of these same young musicians and was similarly identified as promising young talent. He has described his influences as "80's music, rap, techno, rock, funk, even doo-wop...". B.o.B has also worked with artists such as British rapper Giggs. Along with his solo producing career, B.o.B is part of a production/rap group called HamSquad, along with Playboy Tre, TJ Chapman, and B. Rich.
Three other singles followed: "Don't Let Me Fall" (released April 6, 2010), "Airplanes" (April 13, 2010; featuring Hayley Williams), and "Bet I" (April 20, 2010; featuring T.I. and Playboy Tre). A video for "Bet I" has been released on Atlantic Videos on YouTube. The album was released April 27, 2010 and was given generally positive reviews. His album sold 84,000 copies in the first week and debuted at #1 on the Billboard 200. It made B.o.B the 13th male solo artist to have a debut album at #1 in its first week. In July, B.o.B announced he will go on tour, naming it The SHOOTiN for Stars Tour. The dates and times were released on his website on July 13. B.o.B has received nominations for his album, singles, and himself by the BET Awards, Teen Choice Awards, MTV Video Music Awards, and the new Suckerfree Summit. "Airplanes" was featured in the trailer for the upcoming movie Charlie St. Cloud and "Magic" also landed him an Adidas commercial with him in it. B.o.B was announced to be a performer at the 2010 MTV Video Music Awards on August 18. He was added to the line-up of Eminem, Linkin Park, Kanye West, Drake, Usher, Paramore, Florence and the Machine, and Justin Bieber.
As of July 2010, B.o.B is the latest artist to star in the new Adidas commercial which features "Magic."
On August 14, 2010, Hayley Williams announced via the Official Paramore Fan Club that B.o.B would be the main support for Paramore's November U.K. Tour. B.o.B also opened for Eminem and Jay-Z's The Home & Home Tour at Comerica Park. B.o.B also did MTV Unplugged session. He performed songs off his debut album together with guests such as Robin Thicke, Melanie Fiona, and Janelle Monae. B.o.B also made an appearance in Lollapalooza 2010. B.o.B. made an appearance at the 2010 MTV VMA's on September 12, 2010. He performed parts of both his singles, "Nothin' On You" with Bruno Mars and "Airplanes" with Hayley Williams of Paramore.
On December 7, 2010, B.o.B. released his mixtape No Genre. B.o.B was named "Best New Artist" by iTunes 2010 Rewind Chart. The Adventures of Bobby Ray was certified Gold by the RIAA on December 16. His song "Champion" from the mixtape May 25 was chosen as the ESPN Bowl Week theme.
Jessie J released a single along with B.o.B called "Price Tag" on 30 January 2011 in the United Kingdom. The song was quick to reach number one in the UK charts selling 84,000 copies in its first week of sales.
On March 22, 2011 Electronic Arts released the Launch Trailer for the upcoming first-person-shooter Crysis 2 which featured a song by B.o.B. entitled "New York New York" containing the main piano chorus from the song "Theme from New York, New York" commonly sung by Frank Sinatra; the song features British singer-songwriter Polly Scattergood singing said chorus.
In Early 2011 Odd Future's Tyler, the Creator released a song titled "Yonkers". In the song Tyler raps (What you think of Hayley Williams?) Fuck her, Wolf Haley robbing 'em / I'll crash that fucking airplane that that faggot nigga B.o.B is in / And stab Bruno Mars in his goddamn esophagus. In response, on March 25th, B.o.B released "No Future" a song in which he takes aim at the hip hop collective and their leader. In June 2011, it was revealed that B.o.B was featured and produced a song on Tech N9ne's twelfth studio album, All 6's and 7's. The track, titled "Am I a Psycho?" also features Horrorcore rapper Hopsin, who also seems to have issues with Tyler, the Creator. In the song, B.o.B apparently takes more shots at Tyler, the Creator.
B.o.B appeared on the official remix to Kesha's hit single "Blow". The remix was released to iTunes on May 17, 2011.
Category:1988 births Category:Living people Category:African American rappers Category:African American record producers Category:African American singer-songwriters Category:Atlantic Records artists Category:People from Decatur, Georgia Category:Rappers from Atlanta, Georgia Category:People from Winston-Salem, North Carolina Category:Southern hip hop musicians
cs:B.o.B da:B.o.B de:B.o.B et:B.o.B es:B.o.B fa:بی.او.بی fr:B.o.B ko:보비 레이 hr:B.o.B id:B.o.B it:B.o.B he:B.o.B lv:B.o.B nl:B.o.B ja:B.o.B no:B.o.B pl:B.o.B pt:B.o.B ro:B.o.B ru:B.o.B simple:B.o.B fi:B.o.B sv:B.o.B th:บี.โอ.บี tr:B.o.B vi:B.o.B zh:B.o.BThis text is licensed under the Creative Commons CC-BY-SA License. This text was originally published on Wikipedia and was developed by the Wikipedia community.
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