Electrical Machines A 3- phase synchronous motor can operate over a wide range of power factors i.e. from lagging to leading power factor. This is achieved by changing the load. changing the field excitation. varying the applied voltage. varying the speed. changing the load. changing the field excitation. varying the applied voltage. varying the speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC Motor dc shunt motor with field weakening. dc series motor. dc compound motor. dc shunt with armature resistance control. dc shunt motor with field weakening. dc series motor. dc compound motor. dc shunt with armature resistance control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In synchronous generator V curve is drawn between field current on X-axis and armature current on Y-axis. field current on X-axis and power factor on Y-axis. field current on Y-axis and armature current on X-axis. either of these. field current on X-axis and armature current on Y-axis. field current on X-axis and power factor on Y-axis. field current on Y-axis and armature current on X-axis. either of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ratio of starting torque to full load torque is minimum in Series motor. Shunt motor. Cumulative compound motor. Differential compound motor. Series motor. Shunt motor. Cumulative compound motor. Differential compound motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them just behind the magnetic neutral axis. None of these just ahead of magnetic neutral axis. in magnetic neutral axis. just behind the magnetic neutral axis. None of these just ahead of magnetic neutral axis. in magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the frequency of a alternator, if P = number of poles and N = revolution made per second? 120 / PN Hz. 120N / P Hz. 120P / N Hz. PN / 2 Hz. 120 / PN Hz. 120N / P Hz. 120P / N Hz. PN / 2 Hz. ANSWER DOWNLOAD EXAMIANS APP
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