Electrical Machines The mechanical power is developed by a DC motor is maximum when back emf is equal to twice of applied voltage. none of above. back emf is equal to applied voltage. back emf is equal to half of applied voltage. back emf is equal to twice of applied voltage. none of above. back emf is equal to applied voltage. back emf is equal to half of applied voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following generators negative voltage regulation can occur? over compound generator shunt generator both B and C series generators over compound generator shunt generator both B and C series generators ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Lap winding is prefered for which type of machines? low current and high voltage low current and low voltage high current and low voltage high current and high voltage low current and high voltage low current and low voltage high current and low voltage high current and high voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The synchronous motor can be started by providing damper winding in its rotor circuit. coupling it with a small AC induction motor called the pony motor. any of the above methods. coupling it with a DC compound motor. providing damper winding in its rotor circuit. coupling it with a small AC induction motor called the pony motor. any of the above methods. coupling it with a DC compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the air gap of IM is increased, ____________ will increase. speed. air gap flux. power factor. magnetizing current. speed. air gap flux. power factor. magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC Motor is driving a constant load torque having armature resistance of 0.25 Ω and armature current of 60 A having connected to a voltage of 230 V. Now a resistance of 1 ohm is added into the armature circuit. The ratio of their speed will be 0.25. 0.72. 0.62. 1.24. 0.25. 0.72. 0.62. 1.24. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS