Electrical Machines Reactive power generated or delivered significantly depends on frequency. excitation. both 1 and 2. load angle. frequency. excitation. both 1 and 2. load angle. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To control the speed of an induction motor, the supply frequency is reduced by 10%. For the same magnetizing current to remain constant, the supply voltage must be reduced by 10% increased by 20% reduced by 20% increased by 10% reduced by 10% increased by 20% reduced by 20% increased by 10% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Resistance commutation is used generally in case of fractional kW DC machines. DC machines bellow 5 kW. DC machines above 10 kW. None of these fractional kW DC machines. DC machines bellow 5 kW. DC machines above 10 kW. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To eliminate 5th harmonic in the induced voltage phase breadth should be 18° 30° 72° 36° 18° 30° 72° 36° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Copper brushes in DC machine are used where low voltage and high currents are involved. where high voltage and low current. None of these in both of above cases. where low voltage and high currents are involved. where high voltage and low current. None of these in both of above cases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator the emf generated by the armature is maximum when induced voltage is high. rate of change of flux is maximum. rate of change of flux is minimum. shaft rotation is high. induced voltage is high. rate of change of flux is maximum. rate of change of flux is minimum. shaft rotation is high. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS