em01 brain01 qm01 In a direct current circuit, if the current is continuous, the fields are constant; there is a condition of stress in the space surrounding the conductor, which represents stored electric and magnetic energy, just as a compressed spring or a moving mass represents stored energy

A History of Neurosurgery: In Its Scientific and Professional Contexts - Page 412 - Google Books Result

books.google.com/books?isbn=1879284170

Samuel H. Greenblatt, T. Forcht Dagi, Mel H. Epstein - 1997 - Medical

In the early 1900s, Horsley and Clarke used direct current to lesion the brain. Direct current had the advantage of creating small, distinct lesions but the ...

 

In a direct current circuit, if the current is continuous, the fields are constant; there is a condition of stress in the space surrounding the conductor, which represents stored electric and magnetic energy, just as a compressed spring or a moving mass represents stored energy. In an alternating current circuit, the fields also alternate; that is, with every half wave of current and of voltage, the magnetic and the electric field start at the conductor and run outwards into space with the speed of light.^[5] Where these alternating fields impinge on another conductor a voltage and a current are induced.^[4]