Electrical Machines In case the conditions for maximum power for DC motor are established, the efficiency of the motor will be Around 100 %. Any where between 75 % and 90 %. Around 90 % Less than 50 % Around 100 %. Any where between 75 % and 90 %. Around 90 % Less than 50 % ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The 3 - Φ induction motor with rotor circuit open will run normally. make noise. not run. get over heated. run normally. make noise. not run. get over heated. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Open circuit test on transformer gives both 1and 2 copper loss eddy current loss hysteresis loss both 1and 2 copper loss eddy current loss hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative leading power factor lagging power factor unity power factor All of these leading power factor lagging power factor unity power factor All of these 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. increase the permeability. reduce both eddy current and hysteresis loss. reduce hysteresis loss only. reduce eddy current loss only. increase the permeability. reduce both eddy current and hysteresis loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then both armature current Ia and speed ωm increase Ia increases and ωm decreses Ia remains constant but ωm increase both decrese both armature current Ia and speed ωm increase Ia increases and ωm decreses Ia remains constant but ωm increase both decrese ANSWER DOWNLOAD EXAMIANS APP
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