Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then Ia increases and ωm decreses Ia remains constant but ωm increase both decrese both armature current Ia and speed ωm increase Ia increases and ωm decreses Ia remains constant but ωm increase both decrese both armature current Ia and speed ωm increase ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For an ideal transformer the winding should have no ohmic resistance on either side equal resistance on primary and secondary side minimum resistance on primary side and maximum resistance on secondary side maximum resistance on primary side and least resistance on secondary side no ohmic resistance on either side equal resistance on primary and secondary side minimum resistance on primary side and maximum resistance on secondary side maximum resistance on primary side and least resistance on secondary side ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The slight curvature at the lower end of the OCC of a self excited DC generator is due to high field resistance. high speed. magnetic inertia. residual flux. high field resistance. high speed. magnetic inertia. residual flux. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Two mechanically coupled alternators deliver power at 50 Hz and 60 Hz respectively. The highest speed of the alternators is 500 rpm. 3000 rpm. 600 rpm. 3600 rpm. 500 rpm. 3000 rpm. 600 rpm. 3600 rpm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The air gap between the yoke and armature is dc machine is kept very small to achieve a stronger magnetic field. to avoid locking of the armature. to avoid over heating. All of these to achieve a stronger magnetic field. to avoid locking of the armature. to avoid over heating. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In above questions, find the power delivered by each of the alternators to a load of impedance 6Ω(resistive) 3190 W, 5040 W. 1000 W, 5040 W. 100 W, 2000 W. 6000 W, 7000 W. 3190 W, 5040 W. 1000 W, 5040 W. 100 W, 2000 W. 6000 W, 7000 W. ANSWER DOWNLOAD EXAMIANS APP
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