Electrical Machines Slip rings of an induction motors are made of carbon. phosphor bronze. aluminium. stainless steel. carbon. phosphor bronze. aluminium. stainless steel. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Counter emf of a DC motor exceeds supply voltage helps in energy conversion. aids applied voltage. regulates its armature voltage. exceeds supply voltage helps in energy conversion. aids applied voltage. regulates its armature voltage. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A single phase transformer when supplied from 220 V, 50 Hz has eddy current loss of 50 W. If the transformer is connected voltage of 330 V, 75 Hz, the eddy current loss will be 168.75 W 50 W 112.5 W 75 W 168.75 W 50 W 112.5 W 75 W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a 3-phase induction motor, if the supply voltage and frequency are reduced by the same ratio, then slip at which maximum torque occurs is less and maximum torque increases less and maximum torque decreases more and maximum torque decreases more and maximum torque remains constant less and maximum torque increases less and maximum torque decreases more and maximum torque decreases more and maximum torque remains constant ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Hunting in a synchronous cannot be due to windage friction. variable frequency. variable supply voltage. variable load. windage friction. variable frequency. variable supply voltage. variable load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To increase starting torque of a 3-phase slip ring induction motor, preferred method is to increase supply frequency supply voltage rotor resistance None of these supply frequency supply voltage rotor resistance None of these ANSWER DOWNLOAD EXAMIANS APP
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