In 1917 the Department of Physics and Department of Electrical Engineering were created at NC State. Prior to that, a combined Department of Physics and Electrical Engineering existed, having been established in 1894.
A history of the Department of Physics (by Jasper Memory and Ray Fornes) exists on that department's website.
A history of the Department of Electrical and Computer Engineering (by George B. Hoadley, Edward G. Manning, and William J. Barclay) also exists, on that department's website.