Electrical Machines The armature core of a DC machine is laminated to minimise hysteresis loss eddy-current loss temperature rise mechanical loss hysteresis loss eddy-current loss temperature rise mechanical loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? 3-phase synchronous generator reluctance motor hysteresis motor 3-phase synchronous motor 3-phase synchronous generator reluctance motor hysteresis motor 3-phase synchronous motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a DC motor is connected across the AC supply it will Run at normal speed. Not run. Run at lower speed. Burn. Run at normal speed. Not run. Run at lower speed. Burn. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which method is less recommendable for induction motor starting in the industries? Auto transformer starting. Stator resistance starting. Rotor resistance starting. Direct online starting. Auto transformer starting. Stator resistance starting. Rotor resistance starting. Direct online starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In an induction motor, what is the ratio of rotor input to rotor copper loss? S 1/(1-S) 1/S 1-S S 1/(1-S) 1/S 1-S ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutators in DC machines have a role of which converts none of these. Both AC to DC and DC to AC. high voltage DC to low voltage DC. AC to DC. none of these. Both AC to DC and DC to AC. high voltage DC to low voltage DC. AC to DC. ANSWER DOWNLOAD EXAMIANS APP
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