Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 340 A. 570 A. 250 A. 440 A. 340 A. 570 A. 250 A. 440 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs either of these. decrease. None of these increase. either of these. decrease. None of these increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is done in speed control of DC motor by field flux control? Inserting an additional resistance in the armature circuit. Inserting resistance to armature circuit and field circuit. Inserting an additional resistance in the field circuit. Any of above. Inserting an additional resistance in the armature circuit. Inserting resistance to armature circuit and field circuit. Inserting an additional resistance in the field circuit. Any of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for hoisting and lowering which type of motor is preferred? AC slip ring motor. Synchronous motor. DC series motor. Single phase induction motor. AC slip ring motor. Synchronous motor. DC series motor. Single phase induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature reaction effect is more in which of the following methods? same in both methods armature resistance control None of these field weakening method same in both methods armature resistance control None of these field weakening method ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor is, in general analogous to auto transformer. None of these two winding transformer with secondary short circuited. two winding transformer with secondary open circuited. auto transformer. None of these two winding transformer with secondary short circuited. two winding transformer with secondary open circuited. ANSWER DOWNLOAD EXAMIANS APP
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