Electrical Machines In DC machine torque depends on which of the following? speed both A and B flux (φ) armature current (I) speed both A and B flux (φ) armature current (I) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For very sensitive and wide speed control, the preferable control method is Multiple voltage control. Ward-Leonard control. Armature control. Field control. Multiple voltage control. Ward-Leonard control. Armature control. Field control. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed demanding more armature current. Increase in speed but armature currnet remains the same. Decrease in speed but armature current remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A triangular mmf wave is produced in the air gap of an electric machine. Such wave is produced by rotor of an synchronous machine. rotor of a dc machine. stator of a induction machine. stator of a dc machine. rotor of an synchronous machine. rotor of a dc machine. stator of a induction machine. stator of a dc machine. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The noise resulting from vibrations of lamination set by magnetic forces, is termed as hum. boo. zoom. magnetostriction. hum. boo. zoom. magnetostriction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current Woud be equal to 2If1. Cannot be predicted due to insufficient data. Would be equal to If1/2. Would be equal to If1. Woud be equal to 2If1. Cannot be predicted due to insufficient data. Would be equal to If1/2. Would be equal to If1. ANSWER DOWNLOAD EXAMIANS APP
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