Electrical Machines If Ke is eddy current constant, Kf is form factor, f is supply frequency, Bm maximum flux density in core of transformer, the expression of eddy current loss in transformer, is given by KefKf2Bm2. Kef2KfBm2. Kef2Kf2Bm. Kef2Kf2Bm2. KefKf2Bm2. Kef2KfBm2. Kef2Kf2Bm. Kef2Kf2Bm2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Swinburne test is conducted under which of the following condition? full load no load half load any of the above full load no load half load any of the above ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following starter is sufficient to start the DC series motor ? 3 point starter 4 point starter All of these 2 point starter 3 point starter 4 point starter All of these 2 point starter ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will Increase by 5%. Depends on other factor. Reduce by 5%. Remain unchanged. Increase by 5%. Depends on other factor. Reduce by 5%. Remain unchanged. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1203 1000 1080 1200 1203 1000 1080 1200 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines No load test of 3-phase induction motor gives which of the following? both A and B None of these constant loss variable loss both A and B None of these constant loss variable loss ANSWER DOWNLOAD EXAMIANS APP
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