Electrical Machines The armature core of a DC machine is laminated to minimise eddy-current loss temperature rise mechanical loss hysteresis loss eddy-current loss temperature rise mechanical loss hysteresis loss ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 75 W 50 W 168.75 W 112.5 W 75 W 50 W 168.75 W 112.5 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage regulation of transformer is given by (E2 - V2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (V2 - E2) / V2 (E2 - V2) / V2 (E2 - V2) / E2 (V2 - E2) / E2 (V2 - E2) / V2 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two synchronous generators operating in parallel 200 MW and 400 MW respectively. The drooping characteristics of their governors are 4% and 5% from no load to full load. Consider the governors operating at 50Hz on no load. How will the machine share, if the load is 600 MW? None of these generator 2 gets over load 200 MW and 400MW generator 1 gets over load None of these generator 2 gets over load 200 MW and 400MW generator 1 gets over load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Addition of 0.3 % to 4.5 % silicon to iron increases the hysteresis loss. increases the electrical resistivity of iron. reduces the saturation magnetization. None of these increases the hysteresis loss. increases the electrical resistivity of iron. reduces the saturation magnetization. None of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A differentially compound motor under high-over-load conditions will behave like a / an series motor. shunt motor. AC synchronous motor. cummulative compound motor. series motor. shunt motor. AC synchronous motor. cummulative compound motor. ANSWER DOWNLOAD EXAMIANS APP
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