Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for commutation. development of torque. generation of voltage. electromechanical energy conversion. commutation. development of torque. generation of voltage. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Shunt Motor having shunt field resistance of 250 Ω and armature resistance of 0.5 Ω is connected to 250 V supply and load current of 21 A. What is the back emf generated ? 240 V. 210 V 230 V. 150 V. 240 V. 210 V 230 V. 150 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generator, brushes are always placed along load axis. armature axis. magnetic neutral axis. geometrical neutral axis. load axis. armature axis. magnetic neutral axis. geometrical neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The residual magnetism of a self-excited dc generator is lost. To build up its emf again the field winding must be replaced field winding must be excited by low voltage dc supply the field winding connection must be reversed the armature connection must be reversed the field winding must be replaced field winding must be excited by low voltage dc supply the field winding connection must be reversed the armature connection must be reversed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a single phase induction motor, the starting torque developed is proportional to V² 1/V supply voltage V 1/V² V² 1/V supply voltage V 1/V² ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The output power indicated on the name plate of any motor is always the Power drawn in KW. Gross power. Power drawn in KVA. Output power at the shaft. Power drawn in KW. Gross power. Power drawn in KVA. Output power at the shaft. ANSWER DOWNLOAD EXAMIANS APP
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