Electrical Machines A DC 4 pole lap wound generator is running at 1000 rpm having 1200 conductors and flux density is 10 mwb. find the generated emf? 100V 20V 10V 200V 100V 20V 10V 200V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking is very effective for series motors. shunt motors. separately excited motors. differential compound motors. series motors. shunt motors. separately excited motors. differential compound motors. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Reactive power generated or delivered significantly depends on both 1 and 2. load angle. excitation. frequency. both 1 and 2. load angle. excitation. frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which one of the following statement is correct ? In an induction motor if the air gap is increased then its speed will reduce its power factor will reduce its speed will increase its efficiency will improve its speed will reduce its power factor will reduce its speed will increase its efficiency will improve ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and the flux of a DC motor are held constant and voltage applied across its armature is increased by 5%, the speed of the motor will increase by 5 %. depend on other factors. remain unchanged. reduce by 5 %. increase by 5 %. depend on other factors. remain unchanged. reduce by 5 %. 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? 1000 rpm 940 rpm 975 rpm 950 rpm 1000 rpm 940 rpm 975 rpm 950 rpm ANSWER DOWNLOAD EXAMIANS APP