Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by sf / 2. sf. s2. f / s. sf / 2. sf. s2. f / s. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Eddy current loss will depends on Frequency Flux density All of these Thickness Frequency Flux density All of these Thickness ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature shaft must be able to withstand All of these bending moment due to weight of the armature. twisting strains due to transmission of torque. any unbalanced magnetic pull on the armature core. All of these bending moment due to weight of the armature. twisting strains due to transmission of torque. any unbalanced magnetic pull on the armature core. 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 115 V 460 V 230 V 65 V 115 V 460 V 230 V 65 V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines As compared to an induction motor, the air gap in a DC motor is more. less than 50%. between 50% and 90%. same. more. less than 50%. between 50% and 90%. same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Transformer cooling and insulating oil must be of low BDV. low resistivity. low viscosity. high viscosity. low BDV. low resistivity. low viscosity. high viscosity. ANSWER DOWNLOAD EXAMIANS APP
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