Electrical Machines A cumulatively compounded dc motor delivers rated load power at rated speed. If the series field is short-circuited, then Ia remains constant but ωm increase both armature current Ia and speed ωm increase Ia increases and ωm decreses both decrese Ia remains constant but ωm increase both armature current Ia and speed ωm increase Ia increases and ωm decreses both decrese ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is sinusoidal. rectangular. pulsating. triangular. sinusoidal. rectangular. pulsating. triangular. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generators are usually designed to develop armature voltages not exceeding 650 V because of the limitations imposed by armature winding field winding commutator starters armature winding field winding commutator starters ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines There are two 2-pole DC machines. Main field axis of machine A is horizontal and that of B is vertical. It is preferable to purchase machine B machine A any of the two machines none of these machine B machine A any of the two machines none of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is -1.92 -0.08 1.92 0.08 -1.92 -0.08 1.92 0.08 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Armature coil is short circuited by brushes when it lies in any of above positions. along field axis. in none of above positions. along neutral axis. in any of above positions. along field axis. in none of above positions. along neutral axis. ANSWER DOWNLOAD EXAMIANS APP
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