Electrical Machines The speed regulation of a DC motor is given as NnL/NfL. (NfL − NnL)/NnL. NnL − NfL. (NnL − NfL)/NfL. NnL/NfL. (NfL − NnL)/NnL. NnL − NfL. (NnL − NfL)/NfL. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC generator without commutator is a AC generator induction motor DC generator DC motor AC generator induction motor DC generator DC motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following motors DC excitation is not required? reluctance motor 3-phase synchronous generator hysteresis motor 3-phase synchronous motor reluctance motor 3-phase synchronous generator hysteresis motor 3-phase synchronous motor ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the full load speed of 3-phase, 50Hz induction motor is 950 rpm, what is its half load speed nearly equals to? 940 rpm 950 rpm 975 rpm 1000 rpm 940 rpm 950 rpm 975 rpm 1000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a loaded DC generator, if the brushes are given a shift from the interpolar axis in the direction of rotation, then the commutation will deteriorate with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with fall of terminal voltage. improve with rise in terminal voltage. deteriorate with rise in terminal voltage. improve with fall of terminal voltage. deteriorate with fall of terminal voltage. improve with rise in terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A shunt generator has a critical field resistance of 300 Ω at a speed of 800 rpm if the speed is raised to 1000 rpm the critical field resistance is 150 Ω. 145 Ω. 225 Ω. 375 Ω. 150 Ω. 145 Ω. 225 Ω. 375 Ω. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS