Electrical Machines For a given torque, reducing diverter resistance of a DC series motor causes decrease in speed but armature current remains the same. increase in speed but armature currnet remains the same. decrease in speed demanding less armature current. increase in speed demanding more armature current. decrease in speed but armature current remains the same. increase in speed but armature currnet remains the same. decrease in speed demanding less armature current. increase in speed demanding more armature current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The brushes of a DC machine should be placed on the commutator in the polar axis. armature in the polar axis. armature midway between poles. commutator in the inter polar axis. commutator in the polar axis. armature in the polar axis. armature midway between poles. commutator in the inter polar axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If starting current of a 3 - Φ induction motor is 5 times the rated current, while rated slip is 4 %, then ratio of starting torque to full load torque is 0.6. 0.8. 0.4. 1. 0.6. 0.8. 0.4. 1. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines There are two 2-pole DC machines. Main field axis of machine A is horizontal and that of B is vertical. It is preferable to purchase any of the two machines none of these machine A machine B any of the two machines none of these machine A machine B ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For satisfactory performance of 3-phase 480V, 60 Hz induction motor, the supply voltage at 50 Hz should be equal to 400 V. 350 V. 420 V. 480 V. 400 V. 350 V. 420 V. 480 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The torque angle, in a synchronous motor, is the angle between None of these the rotating stator flux and rotor flux. magnetizing electric current and back emf. the supply voltage and the back emf. None of these the rotating stator flux and rotor flux. magnetizing electric current and back emf. the supply voltage and the back emf. ANSWER DOWNLOAD EXAMIANS APP
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