Electrical Machines In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be PN/120. PN/60. PN/2. PN/3000. PN/120. PN/60. PN/2. PN/3000. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The wound rotor type IM is used for____________ speed operation. minimum. variable. maximum. constant. minimum. variable. maximum. constant. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will remains same. none of these. Decrease.d increase. remains same. none of these. Decrease.d increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of these types of motor is self starting? Single phase induction motor. Poly-phase synchronous machine. Poly-phase induction motor. None of these. Single phase induction motor. Poly-phase synchronous machine. Poly-phase induction motor. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor electromagnetic power varies None of these directly as square of applied voltage inversely as applied voltage directly as applied voltage None of these directly as square of applied voltage inversely as applied voltage directly as applied voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the emf generated by a 4 pole Lap connected DC Motor rotating at 1500 rpm having 1000 conductors and useful flux per pole is 0.4 mWb. 40 volts. 30 volts. 10 volts. 20 volts. 40 volts. 30 volts. 10 volts. 20 volts. ANSWER DOWNLOAD EXAMIANS APP
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