Electrical Machines Which of the following is/are the advantages of carbon brush over the copper brush? They are not hard as copper brush All of these They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes They are not hard as copper brush All of these They are self lubricating in nature In case of any sparking they will be less damaged than copper brushes ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. Highest speed of alternator is 3000 rpm. 600 rpm. 3600 rpm. 500 rpm. 3000 rpm. 600 rpm. 3600 rpm. 500 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In escalator which motor is used? 3 - φ IM. Universal motor. 1 - φ IM. DC shunt motor. 3 - φ IM. Universal motor. 1 - φ IM. DC shunt motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer action requires a alternating electric flux. alternating magnetic lux. constant magnetic flux. increasing magnetic flux. alternating electric flux. alternating magnetic lux. constant magnetic flux. increasing magnetic flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Field winding of a DC series motor is usually provided with thick wire to reduce the insulation of materials. as it carries large load current. in order to reduce eddy current to provide large flux. to provide large flux. to reduce the insulation of materials. as it carries large load current. in order to reduce eddy current to provide large flux. to provide large flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor is accidentally connected to single phase ac supply voltage. The torque produced will be None of these steady and unidirectional pulsating and unidirectional oscillating None of these steady and unidirectional pulsating and unidirectional oscillating ANSWER DOWNLOAD EXAMIANS APP
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