Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss? 40W 100W 80W 60W 40W 100W 80W 60W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The condition for maximum running torque is 0.5 lagging unity R = S.X zero 0.707 lagging 0.5 lagging unity R = S.X zero 0.707 lagging ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor must started on no load because it would Not develop starting torque. Fail to start without load. Run at dangerously high speed. Draw more current without producing sufficient torque. Not develop starting torque. Fail to start without load. Run at dangerously high speed. Draw more current without producing sufficient torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer, hysteresis and eddy current losses depend upon maximum flux density both 2 and 3 supply frequency load current maximum flux density both 2 and 3 supply frequency load current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For which of the following loads, armature reaction is magnetizing in nature? pure inductive load None of these pure capacitive load pure resistive load pure inductive load None of these pure capacitive load pure resistive load ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Quadrature axis synchronous reactance is the ratio of Vmin to Imin. Vmax to Imax. Vmin to Imax. Vmax to Imin. Vmin to Imin. Vmax to Imax. Vmin to Imax. Vmax to Imin. ANSWER DOWNLOAD EXAMIANS APP
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