Electrical Machines At stand still condition the value of slip is infinite value 0 finite value 1 infinite value 0 finite value 1 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a 3 - Φ induction motor is clockwise when it is supplied with 3 - Φ sinusoidal voltage having phase sequence A - B - C. For counterclockwise rotation of motor, the phase sequence of the supply should be C - A - B. B - C - A. A - C - B. B - C - A or C - A - B. C - A - B. B - C - A. A - C - B. B - C - A or C - A - B. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The shaft torque of a dc motor is less than the electromagnetic torque because of ohmic losses. mechanical losses. eddy current losses. hysteresis losses. ohmic losses. mechanical losses. eddy current losses. hysteresis losses. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starter is not used with large DC motor for starting, it will draw a starting current many times its rated full load current. damage the armature and commutator. provide execessive voltage drop in line. all of above. draw a starting current many times its rated full load current. damage the armature and commutator. provide execessive voltage drop in line. all of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following are variable losses? armature copper loss shunt field copper loss hysteresis loss eddy current loss armature copper loss shunt field copper loss hysteresis loss eddy current loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is/are the necessary conditions for voltage build up in self excited generator? All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. All of these Field winding should be properly connected to armature winding. Field winding resistance should be less than critical resistance. Poles should contain residual flux. ANSWER DOWNLOAD EXAMIANS APP
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