Phase Displacement

Author: E.E. Kimberly

If in Fig. 4-1 a second conductor b, which is separated from conductor a by the angle θ₂, be caused to move in the same path as a and with the same velocity and in the same direction as a, there will be induced in conductor b a sinusoidally varying emf E_b. The sinusoid marked e_b is a plot of the instantaneous values of E_b. The maximum value of E_b will occur later than that of E_a by a time interval corresponding to the angle θ₂ and the velocity of rotation. The angle θ₂ is the space angle between conductors a and b and is also called the time phase displacement angle between E_a and E_b. The emf E_b is said to lag E_a by θ₂ degrees, or E_a is said to lead E_b by θ₂ degrees.