Hawkins Electrical Guide v. 05 (of 10) / Questions, Answers, & Illustrations, A progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications

by N. Hawkins

inductance pressure = inductance reactance × virtual current;

that is,

E_i = X_iI_v (2)

Fig. 1,315.—Diagram for impressed pressure on circuit containing 5 volts ohmic drop and 15 volts reactance drop.

Now the reactance X_i, that is the spurious resistance, is obtained from the formula

X_i = 2πfL (3)

as explained on page [1,038], and in order to obtain the volts necessary to overcome this spurious resistance, that is, the "reactance drop" as it is called, the value of X_i in equation (3) must be substituted in equation (2), giving

E_i = 2πfLI (4)

writing simply I for the virtual pressure.