Electrical Machines Ward-Leonard system for controlling the speed of a DC motor is used where Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. The accuracy in speed control is required. All of above. Very fine speed control over the whole range from zero to normal speed is required. The speed in both the direction is required. The accuracy in speed control is required. All of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature flux is.............with respect to main field flux or main field poles? rotates same direction stationary None of these rotates opposite direction rotates same direction stationary None of these rotates opposite direction ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the field-flux axis and armature-mmf axis are respectively along quadrature axis and interpolar axis quadrature axis and direct axis direct axis and interpolar axis direct axis and indirect axis quadrature axis and interpolar axis quadrature axis and direct axis direct axis and interpolar axis direct axis and indirect axis ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For the above problem, find the induced voltage of an alternator of it is to deliver a load of 100 A at power factor of 0.8 lagging with terminal voltage of 200 V. 220 V. 222 V. 230 V. 225 V. 220 V. 222 V. 230 V. 225 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 4 pole DC shunt generator having a wave winding supplies 50 lamps, each of 60 W at 120 V. The armature and field resistance are 0.2 Ω and 60 Ω respectively. The current in each armature conductor is 23 A. 13.5 A. 11.5 A. 27 A. 23 A. 13.5 A. 11.5 A. 27 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a step down transformer which one of the following statements is true? Secondary current is less than primary current. Number of secondary turns is more than that of primary. Secondary power is less than primary power. Number of secondary turns is less than primary turns. Secondary current is less than primary current. Number of secondary turns is more than that of primary. Secondary power is less than primary power. Number of secondary turns is less than primary turns. ANSWER DOWNLOAD EXAMIANS APP
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