Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then 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 both armature current Ia and speed ωm increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Iron losses in a DC machine are independent of variation in speed. speed and voltage. voltage. load. speed. speed and voltage. voltage. load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The inertia constant H of a synchronous condenser is greater than that of turbo alternator. greater than that of hydro generator. equal to that of the effective length of the line. none of these. greater than that of turbo alternator. greater than that of hydro generator. equal to that of the effective length of the line. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following components of a DC generator plays vital role for providing direct electric current of a DC generator? Commutator. Eye bolt. Equalizer rings. Dummy coils. Commutator. Eye bolt. Equalizer rings. Dummy coils. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if the field flux axis is ahead of the armature field axis in the direction of rotation, the machine operating is asynchronous generator. asynchronous motor. synchronous generator. synchronous motor. asynchronous generator. asynchronous motor. synchronous generator. synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A frog leg winding is used in a DC machine to eliminate the use of compensating winding. the use drum winding. the use equalizer in lap winding. reactance voltage produced due to communication. the use of compensating winding. the use drum winding. the use equalizer in lap winding. reactance voltage produced due to communication. ANSWER DOWNLOAD EXAMIANS APP
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