Electrical Machines Example of double excited machine is Both are correct. None of these DC Shunt Motor Synchronous motor. Both are correct. None of these DC Shunt Motor Synchronous motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines φA DC shunt machine generates 250 V on open circuit at 1000 RPM. Armature resistance is 0.5 Ω, field resistance 250 Ω. When running as a motor takes 4 A at 250 V. Calculate the speed when running as a motor taking 40 A at 250 V. Armature reaction weakens the field by 4%. 940 RPM 920 RPM 960 RPM 970 RPM 940 RPM 920 RPM 960 RPM 970 RPM ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two transformers operating in parallel will share the load depending on their per unit impedance ratings efficiency leakage reactance per unit impedance ratings efficiency leakage reactance ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp? 60 V. 30 V. 40 V. 90 V. 60 V. 30 V. 40 V. 90 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is none of these. modified. increased. reversed. none of these. modified. increased. reversed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If in DC Shunt Motor the flux is reduced suddenly to zero, then the motor will attain dangerously high speed. the armature current will reduce. the speed of motor will be reduced. the motor will come to stop. the motor will attain dangerously high speed. the armature current will reduce. the speed of motor will be reduced. the motor will come to stop. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS