Bon Scott

Ronald Belford "Bon" Scott (9 July 1946 – 19 February 1980) was a Scottish-born Australian rock musician, best known for being the lead singer and lyricist of Australian hard rock band AC/DC from 1974 until his death in 1980. He was born in Forfar and lived in Kirriemuir, Scotland, for 5 years before moving to Melbourne, Australia, with his family in 1952 at the age of six. The family lived in the suburb of Sunshine for four years before moving to Fremantle, Western Australia.

Scott formed his first band, The Spektors, in 1964 and became the band's drummer and occasional lead vocalist. He performed in several other bands including The Valentines and Fraternity before replacing Dave Evans as the lead singer of AC/DC in 1974.

In the July 2004 issue of Classic Rock, Scott was rated as number one in a list of the "100 Greatest Frontmen Of All Time" ahead of Freddie Mercury and Robert Plant. Hit Parader ranked Scott as fifth on their 2006 list of the 100 Greatest Heavy Metal Vocalists of all time.

Angus Young

Angus McKinnon Young (born 31 March 1955) is an Australian guitarist of Scottish origin, best known as a co-founder, lead guitarist, and songwriter of the Australian hard rock band AC/DC. Born in Glasgow, Scotland, he moved to Australia with his family at the age of eight. Known for his energetic performances, schoolboy-uniform stage outfits, and his own version of Chuck Berry's duckwalk, Young was ranked by Rolling Stone magazine as being among the greatest guitarists of all time.

AC/DC have remained together since their formation in 1973 and have released 17 studio albums. The band have shipped over 200 million albums worldwide, with over 70 million certified units in the US. Their 1980 studio album, Back in Black, is accountable for 50 million of those worldwide sales and is the second all-time highest-selling album worldwide. In 2003, Young and the other members of AC/DC were inducted into the Rock and Roll Hall of Fame.

Early life

The youngest of eight children of William (1911–1985) and Margaret Young (1913–1988), Angus was born in Cranhill, Glasgow, Scotland. In 1963 he emigrated from Scotland to Sydney, Australia, with his parents, older brothers Malcolm and George, and older sister Margaret. He dropped out of Ashfield Boys High School at age 15. His older brother, Alex, remained in Scotland and would later form the London-based group Grapefruit.

Brian Johnson

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Brian Johnson (born 5 October 1947) is an English singer and songwriter. Since 1980, he has been the lead singer of the Australian rock band AC/DC, with whom he was inducted into the Rock and Roll Hall of Fame in 2003.

Johnson was one of the founding members of the rock band Geordie formed in Newcastle in 1971. After a few hit singles, including UK Top 10 "All Because of You" (1973), the band split up in 1978. Following the death of AC/DC frontman Bon Scott on 19 February 1980, Johnson was asked to audition for the band in London. AC/DC lead guitarist and co-founder Angus Young recalled: "I remember Bon playing me Little Richard, and then telling me the story of when he saw Brian singing [with Geordie]." He says about that night: "There's this guy up there screaming at the top of his lungs and then the next thing you know he hits the deck. He's on the floor, rolling around and screaming. I thought it was great, and then to top it off – you couldn't get a better encore – they came in and wheeled the guy off!'" Johnson was diagnosed with appendicitis later that night, which was the cause of his writhing around on stage. The band agreed immediately that Johnson's performing style fit AC/DC's music. Johnson's first album with AC/DC, Back in Black, became the second best-selling album worldwide.

Rock and roll

Rock and roll (often written as rock & roll or rock 'n' roll) is a genre of popular music that originated and evolved in the United States during the late 1940s and early 1950s, from a combination of African-American genres such as blues, boogie woogie, jump blues, jazz, and gospel music, together with Western swing and country music. Though elements of rock and roll can be heard in blues records from the 1920s and in country records of the 1930s, the genre did not acquire its name until the 1950s.

"Rock and roll" can refer either to the first wave of music that originated in the US in the 1950s prior to its development into "rock music", or more broadly to rock music and culture. For the purpose of differentiation, this article deals with the first definition.

In the earliest rock and roll styles of the late 1940s and early 1950s, either the piano or saxophone was often the lead instrument, but these were generally replaced or supplemented by guitar in the middle to late 1950s. The beat is essentially a blues rhythm with an accentuated backbeat, the latter almost always provided by a snare drum. Classic rock and roll is usually played with one or two electric guitars (one lead, one rhythm), a string bass or (after the mid-1950s) an electric bass guitar, and a drum kit. Beyond simply a musical style, rock and roll, as seen in movies and on television, influenced lifestyles, fashion, attitudes, and language. In addition, rock and roll may have contributed to the civil rights movement because both African-American and white American teens enjoyed the music. It went on to spawn various genres, often without the initially characteristic backbeat, that are now more commonly called simply "rock music" or "rock".

High voltage

The term high voltage usually means electrical energy at voltages high enough to inflict harm on living organisms. Equipment and conductors that carry high voltage warrant particular safety requirements and procedures. In certain industries, high voltage means voltage above a particular threshold (see below). High voltage is used in electrical power distribution, in cathode ray tubes, to generate X-rays and particle beams, to demonstrate arcing, for ignition, in photomultiplier tubes, and in high power amplifier vacuum tubes and other industrial and scientific applications.

Definition

The numerical definition of 'high voltage' depends on context. Two factors considered in classifying a voltage as "high voltage" are the possibility of causing a spark in air, and the danger of electric shock by contact or proximity. The definitions may refer to the voltage between two conductors of a system, or between any conductor and ground.

In electric power transmission engineering, high voltage is usually considered any voltage over approximately 35,000 volts. This is a classification based on the design of apparatus and insulation.