SolenoidA solenoid (ˈsoʊlənɔɪd) is a type of electromagnet formed by a helical coil of wire whose length is substantially greater than its diameter, which generates a controlled magnetic field. The coil can produce a uniform magnetic field in a volume of space when an electric current is passed through it. André-Marie Ampère coined the term solenoid in 1823, having conceived of the device in 1820. The helical coil of a solenoid does not necessarily need to revolve around a straight-line axis; for example, William Sturgeon's electromagnet of 1824 consisted of a solenoid bent into a horseshoe shape (similarly to an arc spring).
MartiniqueMartinique (ˌmɑːrtᵻˈniːk , maʁtinik; Matinik or Matnik; Kalinago: Madinina or Madiana) is an island which is a single territorial collectivity of the French Republic. It is also part of the European Union as an Outermost Region within the Special territories of members of the European Economic Area, but is not part of the Schengen Area and the European Union Customs Union. As part of the French (Antilles) West Indies, Martinique is located in the Lesser Antilles of the West Indies in the eastern Caribbean Sea.
Le CorbusierCharles-Édouard Jeanneret (6 October 1887 - 27 August 1965), known as Le Corbusier (UKlə_kɔːrˈbjuːzieɪ , USlə_ˌkɔːrbuːˈzjeɪ,_-ˈsjeɪ , lə kɔʁbyzje), was a Swiss-French architect, designer, painter, urban planner and writer, who was one of the pioneers of what is now regarded as modern architecture. He was born in Switzerland and became a French citizen in 1930. His career spanned five decades, in which he designed buildings in Europe, Japan, India, as well as North and South America.
Complex numberIn mathematics, a complex number is an element of a number system that extends the real numbers with a specific element denoted i, called the imaginary unit and satisfying the equation ; every complex number can be expressed in the form , where a and b are real numbers. Because no real number satisfies the above equation, i was called an imaginary number by René Descartes. For the complex number , a is called the , and b is called the . The set of complex numbers is denoted by either of the symbols or C.
