Electrical Machines A synchronous generator is feeding a zero power factor (lagging) load at rated current. The armature reaction is demagnetizing. magnetizing. cross – magnetizing. ineffective. demagnetizing. magnetizing. cross – magnetizing. ineffective. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3 phase stepper motor has 6 stator poles and 4 rotor poles, then find the step angle? 30° 45° 10° 60° 30° 45° 10° 60° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 220 V DC generator is run at full speed without any excitation. The open circuit voltage will be about 2 V. about 50 V. zero. 220 V. about 2 V. about 50 V. zero. 220 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of stator rotating magnetic field (RMF) with respect to rotor is Zero Nr S.Ns Ns Zero Nr S.Ns Ns ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type short - shunt generator. series generator. level compound. shunt generator. short - shunt generator. series generator. level compound. shunt generator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Consider the following statements regarding the speed control of dc motors : 1. ward-leonard method is suitable forconstant-torque drives 2. Ward-leonard method is suitable for constant-power drives 3. field-control method facilitates speed control below base speed 4. Armature-resistance control method is more efficient than ward-leanard method 5. Field-control method is suitable for constant-torque drives 6. Armature-resistance control method is suitable for constant-torque drives From these, the correct answer is 1, 2, 6 1, 2, 5 1, 4, 6 1, 3, 5 1, 2, 6 1, 2, 5 1, 4, 6 1, 3, 5 ANSWER DOWNLOAD EXAMIANS APP
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