Electrical Machines A 2 pole synchronous machine is operating at 3000 rpm. Find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm) ? ωe = 2*ωm ωe = ωm ωe = 4*ωm ωe = 1/2*ωm ωe = 2*ωm ωe = ωm ωe = 4*ωm ωe = 1/2*ωm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm. Find the rotor efficiency? 96% 94% 92% 95% 96% 94% 92% 95% ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor Remains same. Decrease. None of these. Increase. Remains same. Decrease. None of these. Increase. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For an ideal transformer the winding should have equal resistance on primary and secondary side minimum resistance on primary side and maximum resistance on secondary side no ohmic resistance on either side maximum resistance on primary side and least resistance on secondary side equal resistance on primary and secondary side minimum resistance on primary side and maximum resistance on secondary side no ohmic resistance on either side maximum resistance on primary side and least resistance on secondary side ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The use of double squirrel cage winding on the rotor provides a large starting torque. reduced starting torque. low noise. higher efficiency. a large starting torque. reduced starting torque. low noise. higher efficiency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An unexcited single phase synchronous motor is AC series motor. universal motor. reluctance motor. repulsion motor. AC series motor. universal motor. reluctance motor. repulsion motor. ANSWER DOWNLOAD EXAMIANS APP
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