6. Wave excitation of a stepper motor results in :
(a) microstepping
(b) half-stepping
(c) increased step angle
(d) reduced resolution
7. A stepper motor having a resolution of 300 steps/rev and running at 2400 rpm has a pulse rate of— pps.
(a) 4000
(b) 8000
(c) 6000
(d) 10,000
8. The torque exerted by the rotor magnetic field of a PM stepping motor with unexcited stator is called ………………torque.
(a) reluctance
(b) detent
(c) holding
(d) either (b) or (c)
9. A variable reluctance stepper motor is constructed of ……………… material with salient poles.
(a) paramagnetic
(b) ferromagnetic
(c) diamagnetic
(d) non-magnetic
10. The rotor of a stepper motor has no :
(a) windings
(b) commutator
(c) brushes
(d) all of the above
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