Electrical Machines The sequence of induction motor is RYB, then the direction of induction motor can be changed by which of the following sequence? BRY All of these BYR RBY BRY All of these BYR RBY ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a 3 - Φ, 4 pole, 50 Hz IM rotating at full load speed of 1440 rpm, calculate speed of rotor field with respect to rotor structure and stator structure respectively? 60, 1500. 50, 1500. 60, 1440. 1440, 1500. 60, 1500. 50, 1500. 60, 1440. 1440, 1500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At what power factor, the voltage regulation of a transformer can be zero ? Unity power factor. Leading power factor. Zero power factor. Lagging power factor. Unity power factor. Leading power factor. Zero power factor. Lagging power factor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At slip s = 1 torque developed in machine is none. starting torque. maximum torque. electromagnetic torque. none. starting torque. maximum torque. electromagnetic torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Crawling in an induction motor is due to slip ring rotor. insufficient starting torque. space harmonics produced by winding currents. time harmonics in supply. slip ring rotor. insufficient starting torque. space harmonics produced by winding currents. time harmonics in supply. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator, inverted V curve is drawn between field current on Y-axis and armature current on X-axis field current on X-axis and armature current on Y-axis field current on X-axis and power factor on Y-axis field current on Y-axis and power factor on X-axis field current on Y-axis and armature current on X-axis field current on X-axis and armature current on Y-axis field current on X-axis and power factor on Y-axis field current on Y-axis and power factor on X-axis ANSWER DOWNLOAD EXAMIANS APP
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