Electrical Machines The material used for commutator brushes is mostly copper. cast iron. mica. carbon. copper. cast iron. mica. carbon. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous motor the torque is proportional to 1/P² Power P 1/P P² 1/P² Power P 1/P P² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for development of torque. electromechanical energy conversion. commutation. generation of voltage. development of torque. electromechanical energy conversion. commutation. generation of voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC series motor must started on no load because it would Fail to start without load. Draw more current without producing sufficient torque. Not develop starting torque. Run at dangerously high speed. Fail to start without load. Draw more current without producing sufficient torque. Not develop starting torque. Run at dangerously high speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The commutator segments of DC machines are made up of copper hard-drawn copper brass copper alloy copper hard-drawn copper brass copper alloy ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC generator will not build up voltage any one of above. if it has lost residual magnetism. if field resistance is more than critical resistance. due to wrong direction of rotation. any one of above. if it has lost residual magnetism. if field resistance is more than critical resistance. due to wrong direction of rotation. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS