Electrical Machines In DC machine torque depends on which of the following? both A and B flux (φ) speed armature current (I) both A and B flux (φ) speed armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature core of a DC machine is laminated to minimise hysteresis loss eddy-current loss temperature rise mechanical loss hysteresis loss eddy-current loss temperature rise mechanical loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? 20 Hz. 30 Hz. Can be determined. 35 Hz. 20 Hz. 30 Hz. Can be determined. 35 Hz. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The direction of rotation of a DC motor can be determent by Flemings left hand rule. Flemings right hand rule. Amperes law. Lenzs law. Flemings left hand rule. Flemings right hand rule. Amperes law. Lenzs law. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following methods of speed control is not affected through stator side? Change of number of pole. Change of supply frequency. Change of rotor resistance. Change of supply voltage. Change of number of pole. Change of supply frequency. Change of rotor resistance. Change of supply voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The coil spam must be exactly equal to people pitch. may or may not be exactly equal to people pitch. can never be equal to pole pitch. none of above. must be exactly equal to people pitch. may or may not be exactly equal to people pitch. can never be equal to pole pitch. none of above. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS