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25. The arrangement which can NOT be used to control the speed of a universal motor operating from a d-c circuit is A. a solid-state

25. The arrangement which can NOT be used to control the speed of a universal motor operating from a d-c circuit is A. a solid-state controller B. a tapped field winding C. an adjustable external resistance D. a mechanical governor.
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25. The arrangement which can NOT be used to control the speed of a universal motor operating from a d-c circuit is A. a solid state controlier B. a tapped field winding C. an adjustable extemal resistance D. a mechanical govemoc

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