Electrical Machines If dimension of all the parts of a synchorous generator and the number of field and armature turns are double, then generated voltage will change by a factor of 2. 1. 8. 4. 2. 1. 8. 4. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The introduction of interpoles in between the main poles improves the performance of a dc machine, because the inequality of air-gap flux on the top and bottom halves of the armature is removed the interpoles produce additional flux to augment the developed torque a counter-emf is induced in the coil undergoing commutation the flux waveform is improved with reduction in harmonics the inequality of air-gap flux on the top and bottom halves of the armature is removed the interpoles produce additional flux to augment the developed torque a counter-emf is induced in the coil undergoing commutation the flux waveform is improved with reduction in harmonics ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The low voltage winding of a 400/230 V single phase 50 Hz transformer is to be connected to keep the magnetization current at the same level in both the cases the voltage at 25 Hz should be 65 V 460 V 230 V 115 V 65 V 460 V 230 V 115 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In field flux method speed control of DC Motor is constant hp drive below the base speed. constant power drive above base speed. constant torque drive below the base speed. constant torque drive above the base speed. constant hp drive below the base speed. constant power drive above base speed. constant torque drive below the base speed. constant torque drive above the base speed. 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? 30 V. 60 V. 40 V. 90 V. 30 V. 60 V. 40 V. 90 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machine yoke offers flux path completion mechanical protection to the machine produce working flux both A and B flux path completion mechanical protection to the machine produce working flux both A and B ANSWER DOWNLOAD EXAMIANS APP
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