Electrical Machines If the applied voltage to a dc machine is 230 V, then the back emf, for maximum power developed, is 230 V 115 V 200 V 460 V 230 V 115 V 200 V 460 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The maximum possible speed at which an alternator can be driven to generate 50 Hz and 4000 V is 1500 rpm. 4000 rpm. 3600 rpm. 3000 rpm. 1500 rpm. 4000 rpm. 3600 rpm. 3000 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machines, the armature windings are placed on the rotor because of the necessity for generation of voltage commutation electromechanical energy conversion development of torque generation of voltage commutation electromechanical energy conversion development of torque ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single-phase transformer has its maximum efficiency at 60 percent of full load. At full load copper loss will be zero. less than core loss. more than core loss. equal to core loss. zero. less than core loss. more than core loss. equal to core loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor has a rotor resistance of 0.002 Ω / phase. If the resistance is increased to 0.004 Ω / phase then the maximum torque will reduced to half increase by 200% increase by 100% remain unaltered reduced to half increase by 200% increase by 100% remain unaltered ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Normally for the design of transformer the ambient temperature is taken as 32°C. 35°C. 27°C. 45°C. 32°C. 35°C. 27°C. 45°C. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS