Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature resistance. increasing armature cooling. increasing input power of the prime mover. increasing terminal voltage. increasing armature resistance. increasing armature cooling. increasing input power of the prime mover. increasing terminal voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The induction motor shaft is made of cast iron. mild steel. stainless steel. aluminium. cast iron. mild steel. stainless steel. aluminium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for electromechanical energy conversion. commutation. development of torque. generation of voltage. electromechanical energy conversion. commutation. development of torque. generation of voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mechanical power is developed by a DC motor is maximum when back emf is equal to twice of applied voltage. back emf is equal to half of applied voltage. back emf is equal to applied voltage. none of above. back emf is equal to twice of applied voltage. back emf is equal to half of applied voltage. back emf is equal to applied voltage. none of above. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If two 8-pole dc machines of identical armature sare wound, one with lap winding and the other with wave winding, then wave-wound machine will have more rated current and more voltage lap-wound machine will have more rated voltage and less current wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and more current wave-wound machine will have more rated current and more voltage lap-wound machine will have more rated voltage and less current wave-wound machine will have more rated voltage and less current lap-wound machine will have more rated voltage and more current ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC cumulatively compounded motor delivers rated load torque at rated speed. If the series field is short-circuited, then the armature current and speed will increase and decrease respectively both decrease decrease and increase respectively both increase increase and decrease respectively both decrease decrease and increase respectively both increase ANSWER DOWNLOAD EXAMIANS APP