Electrical Machines In a DC machine, for the same value of Æ, Z and N; which one of the following statements is correct? Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is more with wave winding than with lap winding. Armature emf is less with wave winding than with lap winding. Armature emf is same as long as the flux density in the air gap remains the same. Armature emf depends on weather the machine is running as a motor or generator. Armature emf is more with wave winding than with lap winding. Armature emf is less with wave winding than with lap winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When an electric train is moving down a hill, the DC motor will operate as DC series motor. DC series generator. DC shunt motor. DC shunt generator. DC series motor. DC series generator. DC shunt motor. DC shunt generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motor has the highest power factor at full load? Capacitor run Shaded pole Capacitor start Resistance split phase Capacitor run Shaded pole Capacitor start Resistance split phase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hopkinss test in DC motor is conducted at ? None of these. Low load. Full load. No load. None of these. Low load. Full load. No load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 3000 rpm 1500 rpm 1000 rpm 750 rpm 3000 rpm 1500 rpm 1000 rpm 750 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Under which of the following conditions hunting of synchronous motor is likely to occur ? Small and constant load. Periodic variation of load. Over-loading for long period. Over-excitation. Small and constant load. Periodic variation of load. Over-loading for long period. Over-excitation. ANSWER DOWNLOAD EXAMIANS APP
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