ABSTRACT
The value and direction of the e.m.f. induced in a conductor rotating at constant speed in a uniform magnetic field, Figure 40(a) vary according to the position of the conductor.
The e.m.f. can be represented by the displacement QP of the point P above the axis XOX, Figure 40(b). OP is a line which is rotating about the point O at the same speed as the conductor is rotating in the magnetic field. The length of OP represents the maximum value of the induced voltage. OP is called a phasor.
