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 1, 4 2, 4 2, 3 1, 3 1, 4 2, 4 2, 3 1, 3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Dynamic braking can be used for shunt motors. series motors. compound motors. All of these shunt motors. series motors. compound motors. All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In which of the following, voltage regulation may be zero or negative lagging power factor leading power factor unity power factor All of these lagging power factor leading power factor unity power factor All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following voltage regulation method is accurate ? MMf method ZPF method Synchronous impedance method American standard association method MMf method ZPF method Synchronous impedance method American standard association method ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator if field winding attains the critical resistance machine will generate maximum voltage. the voltage generated will be zero. machine will generate maximum power. field winding will burn. machine will generate maximum voltage. the voltage generated will be zero. machine will generate maximum power. field winding will burn. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hysteresis loss will depends on f² f³ f1.6 f f² f³ f1.6 f ANSWER DOWNLOAD EXAMIANS APP
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