Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to high field resistance. magnetic inertia. high speed. residual flux. high field resistance. magnetic inertia. high speed. residual flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following will vary the maximum torque? rotor resistance R rotor reactance X None of these both 1 and 2 rotor resistance R rotor reactance X None of these both 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Considering a galvanometer is connected to the rotor of a 3 - Φ, 4 pole, 50 Hz IM and is making 130 oscillations in a minute, then calculate the rotor speed? 1440. 1435. 1450. 1500. 1440. 1435. 1450. 1500. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements : For a level compounded dc generator to run at constant voltage, the series field mmf must effectively compensate 1. armature reaction mmf 2.armature resistance drop 3. brush contact voltage drop Which of these statements is/are correct ? 1 and 3 1, 2 and 3 2 alone 1 and 2 1 and 3 1, 2 and 3 2 alone 1 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For small value armature current Ia the torque developed by a DC series motor is proportional to Ia. Ia2. √Ia. 1/Ia. Ia. Ia2. √Ia. 1/Ia. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The size of inter poles is small as compared to main poles. What is the reason? In order to get saturated. In order to get more flux. All of these In order to not to get saturated. In order to get saturated. In order to get more flux. All of these In order to not to get saturated. ANSWER DOWNLOAD EXAMIANS APP
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