Electrical Machines Which of the following windings are necessary in case of all dc machines? closed winding wave winding open type winding lap winding closed winding wave winding open type winding lap winding ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to armature emf. reactance voltage induced in the coil. None of these coil resistance. armature emf. reactance voltage induced in the coil. None of these coil resistance. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines When a DC cummulative compound wound motor is loaded Both torque and speed decrease. Torque and speed both increase. Torque increase and speed decrease. Torque decrease and speed increases. Both torque and speed decrease. Torque and speed both increase. Torque increase and speed decrease. Torque decrease and speed increases. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is Zero Nr Ns S.Ns Zero Nr Ns S.Ns ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum allowable moisture content of power transformer insulating oil is generally taken as 20 ppm. 45 ppm. 35 ppm. 25 ppm. 20 ppm. 45 ppm. 35 ppm. 25 ppm. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Air core transformer as compared to iron core transformer, has less magnetic core loss. more magnetic core loss. more copper loss. no magnetic core loss. less magnetic core loss. more magnetic core loss. more copper loss. no magnetic core loss. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS