Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is S.Ns Zero Ns Nr S.Ns Zero Ns Nr ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as crawling. cogging. air gap. relative speed. crawling. cogging. air gap. relative speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Speed of DC motor can be controlled by varying resistance of armature culture. its flux oer pole. applied voltage. all of these. resistance of armature culture. its flux oer pole. applied voltage. all of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum power developed in cylindrical synchronous machine is occurs at a load angle of less than 90o. 0o. Greater than 90o. 90o. less than 90o. 0o. Greater than 90o. 90o. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Magnetic field of a DC generator is produced by what? Permanent magnets. Both B and C. Electromagnets. None of the options. Permanent magnets. Both B and C. Electromagnets. None of the options. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them just ahead of magnetic neutral axis. just behind the magnetic neutral axis. None of these in magnetic neutral axis. just ahead of magnetic neutral axis. just behind the magnetic neutral axis. None of these in magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
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