(Solved): Select the tele draw for ite overtion 21. The speed ef a shunt-wound dee moter may be emelently regu ...

Select the tele draw for ite overtion 21. The speed ef a shunt-wound dee moter may be emelently regulated by an exermal field rheostat because such a rheoutal A. asds revistance in parallel with the field. B. lowers the amahae correrl. C. causes tha speed to rary with load changes. D. varias the feld current megardiats of load.