Electrical Machines Commutator pitches of duplex and simplex lap windings are respectively 2 and 2 2 and 1 4 ang 1 4 and 2 2 and 2 2 and 1 4 ang 1 4 and 2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cogging and crawling are phenomena associated with cage induction machines and they are essentially the same. the former during starting and the latter at a fraction of its rated speed. any of the above. the former at a fraction of its rate speed and the latter during starting. cage induction machines and they are essentially the same. the former during starting and the latter at a fraction of its rated speed. any of the above. the former at a fraction of its rate speed and the latter during starting. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The constant losses in transformer is/are hysteresis loss. both 2 and 3. copper loss. eddy current loss. hysteresis loss. both 2 and 3. copper loss. eddy current loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Compensating windings are used in DC generators to provide path for the circulation of cooling air. to neutralize the cross magnetizing effect of the armature reaction. mainly to reduce the eddy currents by providing local short circuit. None of these to provide path for the circulation of cooling air. to neutralize the cross magnetizing effect of the armature reaction. mainly to reduce the eddy currents by providing local short circuit. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by s2. sf / 2. sf. f / s. s2. sf / 2. sf. f / s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides low noise. reduced starting torque. a large starting torque. higher efficiency. low noise. reduced starting torque. a large starting torque. higher efficiency. ANSWER DOWNLOAD EXAMIANS APP
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