Electrical Machines The armature core of a DC machine is laminated to minimise hysteresis loss mechanical loss eddy-current loss temperature rise hysteresis loss mechanical loss eddy-current loss temperature rise ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Use of fractional pitch winding All of these results in reduced leakage reactance. results in reduced axial length of the machine. make it stiffer. All of these results in reduced leakage reactance. results in reduced axial length of the machine. make it stiffer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature of DC machine is made of silicon steel lamination to reduce hysteresis loss only. reduce eddy current loss only. reduce both eddy current and hysteresis loss. increase the permeability. reduce hysteresis loss only. reduce eddy current loss only. reduce both eddy current and hysteresis loss. increase the permeability. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The emf induced in a conductor rotating in a bipolar field is DC. both of above. None of these AC. DC. both of above. None of these AC. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating windings is placed in which part of a D.C motor? On yoke in the pole faces. None of these On armature. On yoke in the inter pole gap. On yoke in the pole faces. None of these On armature. On yoke in the inter pole gap. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated) changes to 1.5 times the original value changes to three times the original value changes to 0.5 times the original value remain the same as the original changes to 1.5 times the original value changes to three times the original value changes to 0.5 times the original value remain the same as the original ANSWER DOWNLOAD EXAMIANS APP
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