Course #1106 SJOJOW Figure 4A Figure 4B

In a DC generator, the effect of armature reaction on the main field is to * reverse it O distort it O reduce it O both (b) and (c)

8. What happens to the magnitude of the magnetic field on the Rotor when an induction machine speed increases closer to synchronous speed? the rotor speeding up has on effect on the magnetic field on the rotor the rotor speeding up increases the magnetic field on the rotor the rotor speeding up decreases the magnetic field on the rotor

A) Although the magnetic field for each phase of a 3-phase induction motor is merely switching back and forth between north and south poles, the resultant magnetic influence from all phases sets up a rotating magnetic field to cut the rotor conductors. a) true b) false B) In a two-pole stator winding of a 3-phase motor, how many revolutions does the rotating tr) magnetic field make in one cycle of the electrical current? a) one b) 60   c) 3600 d) none of the above