Electrical Machines which of the following losses are negligible in blocked rotor test? copper loss iron loss both A and B mechanical loss copper loss iron loss both A and B mechanical loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine, the angle between the stator and rotor fields is 0o. dependent upon the load. 180o. 90o. 0o. dependent upon the load. 180o. 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 200 V 115 V 230 V 460 V 200 V 115 V 230 V 460 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Iron losses in a DC machine are independent of variation in speed and voltage. speed. load. voltage. speed and voltage. speed. load. voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following represents the commutator pitch? The distance between the staring of first coil and its next successive coil Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. Number of conductors spanned by one coil at the front end of the armature. The distance between the staring of first coil and its next successive coil Number of commutator segments between two successive coils. Number of conductors spanned by one coil at the back end of the armature. Number of conductors spanned by one coil at the front end of the armature. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is 375 Ω. 145 Ω. 150 Ω. 225 Ω. 375 Ω. 145 Ω. 150 Ω. 225 Ω. ANSWER DOWNLOAD EXAMIANS APP
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