Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to magnetic inertia. residual flux. high field resistance. high speed. magnetic inertia. residual flux. high field resistance. high speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If a transformer has turns ratio K, the primary and secondary current are I1 and I2 respectively and magnetizing current and core loss component of no load current Iμ and Iw respectively, then I1 = KI2. I1 = KI2 + Iw + Iμ.ok I1 = KI2 + Iw. I1 = KI2 + Iμ. I1 = KI2. I1 = KI2 + Iw + Iμ.ok I1 = KI2 + Iw. I1 = KI2 + Iμ. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In travelling cranes for crane travel, trolley and boom hoist which motor is preferred? Slip ring induction motor. DC differential compound motor. Synchronous motor. Stepper motor. Slip ring induction motor. DC differential compound motor. Synchronous motor. Stepper motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The constant losses in transformer is/are both 2 and 3. eddy current loss. hysteresis loss. copper loss. both 2 and 3. eddy current loss. hysteresis loss. copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 250 volt dc series motor having an armature resistance of 0.2 Ω takes a load current of 60 A. What will be the torque produced at the shaft of the motor? Consider brush drop of 1V. 266.20 N-m. 234.76 N-m. 133.22 N-m can not be determined. 266.20 N-m. 234.76 N-m. 133.22 N-m can not be determined. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Autotransformer makes effective saving on copper and copper losses, when its transformation ratio is equal to approx to one. greater than one. very low less than one. approx to one. greater than one. very low less than one. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS