Electrical Machines A compound motor has both shunt and series field winding. tertiary winding. only shunt field winding. only series field winding. both shunt and series field winding. tertiary winding. only shunt field winding. only series field winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC generator will be in a position to build up without any residual magnetism in the field? Series. Separately excited. Compound. Shunt. Series. Separately excited. Compound. Shunt. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the number of rotor slots is equal to number of stator slots, then motor refuses to start. Hence it is known as air gap. relative speed. crawling. cogging. air gap. relative speed. crawling. cogging. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the armature current of 5 Amp is flowing through the dc motor the torque produced is 47 Nm. Keeping the speed constant if the armature current is increased to 7 amp, calculate the new torque. Assume losses to be constant. 27.73 Nm . 38.5 Nm. 65.8 Nm. 74 Nm. 27.73 Nm . 38.5 Nm. 65.8 Nm. 74 Nm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the load current and flux of a DC motor are held constant and voltage applied across it armature is increased by 5%, the speed of the motor will Increase by 5%. Depends on other factor. Remain unchanged. Reduce by 5%. Increase by 5%. Depends on other factor. Remain unchanged. Reduce by 5%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In 3 - Φ induction motor some times copper bars are placed deep in the rotor to improve starting torque. improve efficiency. reduce copper loss. improve power factor. improve starting torque. improve efficiency. reduce copper loss. improve power factor. ANSWER DOWNLOAD EXAMIANS APP
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