1. Atwo-pole 60 Hz induction motor has a slip of2%on full load. The full-load
speed is
(a) 58.8 r/s (b) 3528 r/min
(c) 60 r/s (d) 2880 r/min
2.The slip of an induction motor can never be zero in a stable state because
(a) the rotor would be at standstill
(b) induced EMF and rotor current would be excessive
(c) it would then be a synchronous motor
(d) there would be no rotor EMF, rotor current or torque
3. The torque provided by the rotor of an induction motor is at a maximum when
(a) speed is maximum
(b) rotor resistance equals rotor reactance
(c) the connected mechanical load is at a minimum
(d) starting
4. If an electronic speed controller feeds an induction motor, the machine….