Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for generation of voltage. commutation. development of torque. electromechanical energy conversion. generation of voltage. commutation. development of torque. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The leakage reactance of a 3-phase alternator is determined by performing open circuit and short circuit tests. short circuit and slip tests. open circuit and zero power factor tests. zero power factor and slip tests. open circuit and short circuit tests. short circuit and slip tests. open circuit and zero power factor tests. zero power factor and slip tests. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the frequency of input voltage of a transformer is increased keeping the magnitude of voltage unchanged, then both hysteresis loss(Ph) and eddy current loss(Pe) will increase Pe will increase but Ph will decrease Ph will increase but Pe will decrease Ph will decrease but Pe will remain same both hysteresis loss(Ph) and eddy current loss(Pe) will increase Pe will increase but Ph will decrease Ph will increase but Pe will decrease Ph will decrease but Pe will remain same ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power factor of an induction motor operating at no load will have a value around unity 0.9 lag 0.2 lag 0.2 lead unity 0.9 lag 0.2 lag 0.2 lead ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A DC motor with armature resistance of 0.5 ohms connected directly to a 220 Volt supply. If the armature is stationary then the current flowing through the armature is 250 A. 440 A. 570 A. 340 A. 250 A. 440 A. 570 A. 340 A. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following starter is sufficient to start the DC series motor ? 4 point starter All of these 2 point starter 3 point starter 4 point starter All of these 2 point starter 3 point starter ANSWER DOWNLOAD EXAMIANS APP
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