A 8-pole alternator rotates at 750 r.p.m. Its per cycle periodic time will be

6) Alternators designed to be driven by steam-turbines are built for :

7) Single phase portable generators are generally made in the range of :

8) An alternator supplies electric power to various kinds of loads of a factory. If the phase sequence of the alternator is changed, it will affect the :

9) The values of pitch factor and distribution factor for an alternator are 0.9 and 0.8 respectively. This will develop an e.m.f. lesser than an alternator having full-pitch coil and concentrated winding by :