Electrical Machines If any two leads from slip rings are interchanged in a 3 - Φ induction motor, the motor will not run. run in a direction opposite to previous one. get damaged. continue running in the same direction as before. not run. run in a direction opposite to previous one. get damaged. continue running in the same direction as before. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines At slip s = 1 torque developed in machine is maximum torque. none. electromagnetic torque. starting torque. maximum torque. none. electromagnetic torque. starting torque. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Air core transformer as compared to iron core transformer, has less magnetic core loss. more magnetic core loss. no magnetic core loss. more copper loss. less magnetic core loss. more magnetic core loss. no magnetic core loss. more copper loss. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The induction motor shaft is made of cast iron. stainless steel. mild steel. aluminium. cast iron. stainless steel. mild steel. aluminium. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If field current is decreased in shunt dc motor, the speed of the motor None of these decreases. increases. remains same. None of these decreases. increases. remains same. ANSWER DOWNLOAD EXAMIANS APP
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