Electrical Machines Larger values of air flux density is taken while designing IM for larger bore diameter. both. none. larger output. larger bore diameter. both. none. larger output. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The back emf produced in a dc motor depends on P and Z. none of these. P. Z. P and Z. none of these. P. Z. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc motor with armature resistance of 0.5 ohms connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is 570 A. 460 A. 250 A. 340 A. 570 A. 460 A. 250 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following machine will have maximum efficiency? Electrical power transformer. Electrical power generator. DC motor. Induction motor. Electrical power transformer. Electrical power generator. DC motor. Induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again the field winding connection must be reversed the field winding must be replaced the armature connection must be reversed field winding must be excited by low voltage dc supply the field winding connection must be reversed the field winding must be replaced the armature connection must be reversed field winding must be excited by low voltage dc supply ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 200 V DC machine supplies 20 A at 200 V as a generator. The armature resistance is 0.2 Ω. If the machine is now operated as a motor at same terminal voltage and current but with the flux increased by 10%, the ratio of motor speed to generator speed is 0.96 0.95 0.87 1.06 0.96 0.95 0.87 1.06 ANSWER DOWNLOAD EXAMIANS APP
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