Basic Radio is a free introductory textbook on electronics based on tubes. See the editorial for more information....

Power Factor

Author: J.B. Hoag

The power (watts) lost as heat in an a.c. circuit occurs in the resistance alone and is equal to I2R. The power consumed in d.c. circuits is given by EI (volts amperes). This product, in a.c. circuits, may be several times the actual power lost. The power factor of an a.c. circuit is defined by

Last Update: 2009-11-01