Electrical Machines A 4 pole, 3-phase induction motor is running at 4% slip at full load. If the speed of the motor is 720 rpm, the supply frequency is 60 Hz 25 Hz 50 Hz 40 HZ 60 Hz 25 Hz 50 Hz 40 HZ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The effect of ------------------ on main field flux is armature reaction? All of these armature flux armature current armature mmf All of these armature flux armature current armature mmf ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The demagnetising component of armature reaction in a DC generator reduces inter poles flux density. results in sparking trouble. increases armature speed. reduces generator emf. reduces inter poles flux density. results in sparking trouble. increases armature speed. reduces generator emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Secondary winding of an auto transformer is also called compensating winding. damping winding. tertiary winding. common winding. compensating winding. damping winding. tertiary winding. common winding. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In applied voltage is reduced in a dc shunt motor Full load speed. Full load current. None of these. Full load torque. Full load speed. Full load current. None of these. Full load torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When the rotor of a 3 phase induction motor is blocked then the slip is 0.3. 0.7. 1. 0.54. 0.3. 0.7. 1. 0.54. ANSWER DOWNLOAD EXAMIANS APP
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