26. If the machine in Problem 8-25 is running at 1800 r/min with a field resistance Radj =...

26. If the machine in Problem 8-25 is running at 1800 r/min with a field resistance Radj = 10 and an armature current of 25 A, what will the resulting terminal voltage be? If the field resistor decreases to 5 while the armature current remains 25 A, what will the new terminal voltage be? (Assume no armature reaction.)