Electrical Machines The mmf produced by rotor currents of a 3 - Φ induction motor rotates at synchronous speed with respect to rotor. rotates at the speed of rotor in the air gap. is at standstill with respect to stator mmf. rotates at slip speed with respect to stator mmf. rotates at synchronous speed with respect to rotor. rotates at the speed of rotor in the air gap. is at standstill with respect to stator mmf. rotates at slip speed with respect to stator mmf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine emf in armature conductors and at the terminals is alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional current and emf in armature are alternating. emf in armature conductors and at the terminals is alternating. current and emf at the terminals are alternating. current and emf in armature are unidirectional current and emf in armature are alternating. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? 3-phase synchronous generator hysteresis motor 3-phase synchronous motor reluctance motor 3-phase synchronous generator hysteresis motor 3-phase synchronous motor reluctance motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor has which of the following characteristics? Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. Has a poor torque. Has a almost constant speed. Has its field winding consinting of thick wire and less no of turns. Can be started easily without load. Has a poor torque. Has a almost constant speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited? 24°. 45°. 30°. 10°. 24°. 45°. 30°. 10°. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors uses slip rings? Induction motors Synchronous motors DC Shunt Motor Both Synchronous and Induction motor Induction motors Synchronous motors DC Shunt Motor Both Synchronous and Induction motor ANSWER DOWNLOAD EXAMIANS APP
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