Electrical Machines Two transformers with identical rating, are designed with flux densities of 1.2 and 1.4 Wb / m2 respectively. The weight of first transformer per kVA is more than that of second transformer. none of these. equal to that of second transformer. less than that of second transformer. more than that of second transformer. none of these. equal to that of second transformer. less than that of second transformer. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance field winding will burn. machine will generate maximum voltage. machine will generate maximum power. the voltage generated will be zero. field winding will burn. machine will generate maximum voltage. machine will generate maximum power. the voltage generated will be zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field of a dc shunt motor gets opened while the motor is running, then the armature current will drop motor will become slow. armature will oscillate about original speed as the mean speed motor will attain dangerously high speed armature current will drop motor will become slow. armature will oscillate about original speed as the mean speed motor will attain dangerously high speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation of transformer is given by (E2 - V2) / E2 (V2 - E2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 - Φ, 4 pole IM is supplied from a 50 Hz source. Calculate rotor frequency when rotor runs 600 rpm? Can be determined. 20 Hz. 30 Hz. 35 Hz. Can be determined. 20 Hz. 30 Hz. 35 Hz. 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 less than core loss. equal to core loss. more than core loss. zero. less than core loss. equal to core loss. more than core loss. zero. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS