United States. Surgeon-General's Office, American Roentgen Ray Society · New York : Middleditch · leaf 26
n coil or a transformer to in-crease voltage involves two distinct circuits, one con-nected through some control device to the supply line orgenerator, and known as the primary circuit; the other,insulated from the primary and connected to the tubeterminals, known as the secondary circuit. The… … Fig. 3. Current-time curve of a simple A. C. circuit.
