Electrical Machines A 500 V, 55 kVA single phase alternator has an effective resistance of 0.5 Ω. An excitation current of 10 A produces 200 A armature current on short circuit and an emf of 450 V on per circuit. The synchronous reactance will be 2.74 Ω. 25.564 Ω. 2.781 Ω. 2.241 Ω. 2.74 Ω. 25.564 Ω. 2.781 Ω. 2.241 Ω. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field-flux axis and armature-mmf axis are respectively along quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis direct axis and interpolar axis quadrature axis and direct axis direct axis and indirect axis quadrature axis and interpolar axis direct axis and interpolar axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To get the speed of DC motor is more than normal without wastage of electrical energy _____________ is used. Ward Leonard control. Any of above method. None of above. Rheostatic control. Ward Leonard control. Any of above method. None of above. Rheostatic control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is rotating with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to armature. stationary with respect to field poles. rotating with respect to field poles. rotating with respect to field poles as well as armature. stationary with respect to armature. stationary with respect to field poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Semi closed slots or totally closed slots are used in induction motors, essentially to reduce magnetising current and improve power factor decrease starting torque increase pull out torque improve starting torque reduce magnetising current and improve power factor decrease starting torque increase pull out torque improve starting torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machine will have maximum efficiency? Electrical power generator. DC motor. Induction motor. Electrical power transformer. Electrical power generator. DC motor. Induction motor. Electrical power transformer. ANSWER DOWNLOAD EXAMIANS APP
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