Electrical Machines For a given torque, reducing divertor resistance of a DC series motor Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. Decrease in speed demanding less armature current. Increase in speed but armature currnet remains the same. Increase in speed demanding more armature current. Decrease in speed but armature current remains the same. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which type of motors are used for lathes? DC shunt motors. Synchronous motor. Either A or B. Cage induction motor. DC shunt motors. Synchronous motor. Either A or B. Cage induction motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The volt-ampere euation for a long-shunt compound motor is given by Vt = Ea + Iara+ ILrs Vt= Ea– Iara Vt= Ea + Iara Vt = Ea + Ia(ra + rs) Vt = Ea + Iara+ ILrs Vt= Ea– Iara Vt= Ea + Iara Vt = Ea + Ia(ra + rs) ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines DC motors are stopped by opening line switches and not by forcing the handle of the motor starter back to OFF position. This is due to occurance of Both of above. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. None of these. Both of above. Heavy sparking at the first stud of starting resistance steps. Heavy sparking at brushes. None of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 3-phase slip ring induction motor is wound for 4 poles on stator and 6 poles on the rotor. When 3-phase balanced voltage source at 50 Hz is applied, it will run at 750rpm 1000 rpm zero speed 1500 rpm 750rpm 1000 rpm zero speed 1500 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the field current is reduced to zero the maximum power developed by alternator is 5.46 KW. 0.9103 KW. 2.73 KW. 1.644 KW. 5.46 KW. 0.9103 KW. 2.73 KW. 1.644 KW. ANSWER DOWNLOAD EXAMIANS APP
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