Electrical Machines The rotor winding for a 3-phase slip-ring induction motor having delta-connected stator must be connected in star. delta or star according to need. delta. None of these star. delta or star according to need. delta. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3- phase synchronous motor can operate over a wide range of power factors i.e. from lagging to leading power factor. This is achieved by varying the applied voltage. varying the speed. changing the field excitation. changing the load. varying the applied voltage. varying the speed. changing the field excitation. changing the load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The basic function of a transformer is to change the power level the level of the voltage the frequency the power factor the power level the level of the voltage the frequency the power factor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited? 10°. 45°. 30°. 24°. 10°. 45°. 30°. 24°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the mechanical power is developed by a DC motor maximum Back emf is equal. Back emf is equal to half of applied voltage. None of above. back emf is equal to applied voltage. Back emf is equal. Back emf is equal to half of applied voltage. None of above. back emf is equal to applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? field weakening method None of these same in both methods armature resistance control field weakening method None of these same in both methods armature resistance control ANSWER DOWNLOAD EXAMIANS APP
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