Electrical Machines The output power of a dc motor is given by EbIa2. EIa. EbIa. none of these. EbIa2. EIa. EbIa. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for generation of voltage. development of torque. commutation. electromechanical energy conversion. generation of voltage. development of torque. commutation. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3 - Φ IM with line frequency f1 and winding factor kw1 and kw2 for stator and rotor respectively the ratio of per phase stator winding emf E1 to per phase rotor winding emf E2 at standstill is given by E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = 1. E1 / E2 = N1 / N2. E1 / E2 = N1kw1 / N2kw2. E1 / E2 = f1kw1 / f2kw2. E1 / E2 = 1. E1 / E2 = N1 / N2. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf in a dc machine is 1. stationary with respect to field poles 2. stationary with respect to armature 3. rotating with respect to field poles 4. rotating with respect to armature From these, the correct answer is 2, 3 1, 4 1, 3 2, 4 2, 3 1, 4 1, 3 2, 4 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 both increase decrease and increase respectively increase and decrease respectively both decrease both increase decrease and increase respectively increase and decrease respectively both decrease ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following motors are suitable for computer printer drive ? Shaded pole motor. Reluctance motor. Hysteresis motor. Stepper motor. Shaded pole motor. Reluctance motor. Hysteresis motor. Stepper motor. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS