Electrical Machines The polarity of a DC generator can be reversed by any of above. reversing the field current. increasing field current. reversing field electric current as well as direction of rotation. any of above. reversing the field current. increasing field current. reversing field electric current as well as direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)? ωe = P*ωm ωe = 2/P*ωm ωe = P/2*ωm ωe = ωm ωe = P*ωm ωe = 2/P*ωm ωe = P/2*ωm ωe = ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The efficiency of a transformer is mainly dependent on core losses. copper losses. dielectric losses. stray losses. core losses. copper losses. dielectric losses. stray losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Commutator in DC generator is used for convert AC armature current in to DC reduce losses collecting of current increase efficiency convert AC armature current in to DC reduce losses collecting of current increase efficiency ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Flux density under trailing pole tips in case of generator will either increase or decrease decrease None of these increase either increase or decrease decrease None of these increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the phase difference between two windings of A.C servomotor ? 60°. 30°. 120°. 90°. 60°. 30°. 120°. 90°. ANSWER DOWNLOAD EXAMIANS APP
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