Refer to the simple two-pole eight-coil machine shown in Figure P7-1. The following information is given about this machine:
The resistance of each rotor coil is 0.04 W.
(a) Is the armature winding shown a progressive or retrogressive winding?
(b) How many current paths are there through the armature of this machine?
(c) What are the magnitude and the polarity of the voltage at the brushes in this machine?
(d) What is the armature resistance RA of this machine?
(e) If a 1 W resistor is connected to the terminals of this machine, how much current flows in the machine? Consider the internal resistance of the machine in determining the current flow.
(f) What are the magnitude and the direction of the resulting induced torque?
(g) Assuming that the speed of rotation and magnetic flux density are constant, plot the terminal voltage of this machine as a function of the current drawn from it.
