Alternating.

A laboratory course in electronics Ramalingom, T. 1980 A textbook of electrical technology: AC & DC machines in S.I. system of units Theraja, B. L. 2005 AC/DC McNichol, Tom 2006 Alternating current bridge methods Hague, Bernard 1946 Alternating current bridge methods Hague, Bernard 1932 Alternating current electrical engineering Kemp, Philip 1937 Alternating current fundamentals Duff, John R. 1986 Alternating currents for technical students Bishop, Calvin Collier 1930 Alternating currents simplified Stubbings, George Wilfred. [from old catalog] 1944 Alternating-current circuit theory Reed, Myril B. 1956 Alternating-current circuits Tang, K. Y. 1960 Alternating-current circuits Kerchner, Russell Marion 1960 Alternating-current circuits Kerchner, Russell M. 1951 Alternating-current circuits Kerchner, Russell M. 1943 Alternating-current circuits Tang, K. Y. 1940 Automatic protection of A.C. circuits Stubbings, George Wilfred 1943 Commercial A. C. measurements Stubbings, George Wilfred 1952 Elements of symmetrical component theory Stubbings, George Wilfred 1937 Primitive land plants Bower, F. O. 1935 Primitive land plants, also known as the Archegoniatae Bower, F. O. 1959