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Johansen was born in Gjerpen to an electrician and a homemaker. He took the siv.ing. degree, and in 1957 the dr.techn. degree. From 1959 to 1985 he was professor of high voltage technology at the Norwegian Institute of Technology . From 1975 he was the deputy rector, from 1976 to 1984 he served as rector, and from 1985 to 1989 was the director of the NTNF. In 1990, he returned to academia as a professor of elkraftteknikk. He chaired the Statoil board from 1984 to 1987, but resigned together with the rest of the board members after they lost control over spending in the Mongstad project.
Johansen contributed to the establishment of Kathmandu University, and due to this a university building was named after him: the Prof. Inge Johansen Engineering Block. Johansen was decorated in 1981 as a Commander of the Order of St. Olav for his work in technical research and education in Norway.
- "Energi og Etikk -Etiske perspektiver på elforsyning", Forlaget Press, 2006
- Mikkelsen, Solveig (5 December 2018). "Tidligere NTH-rektor Inge Johansen er død". Universitetsavisa.no. Retrieved 9 December 2018.
- Henriksen, Petter, ed. (2007). "Inge Johannes Tjernes Johansen". Store norske leksikon (in Norwegian). Oslo: Kunnskapsforlaget. Retrieved 7 April 2009.
- "Archived copy". Archived from the original on 10 March 2012. Retrieved 22 September 2010.
- "Brochure : General Information to BE Program Applicants" (PDF). Ku.edu.np. 2010. Retrieved 9 December 2018.
- Inge Johansen at NTNU.no
- Inge Johansen, DVD interview (University Library of Trondheim, Dorabiblioteket)
| Rector of the Norwegian Institute of Technology
| Chair of Statoil
Jan Erik Langangen