Electrical Machines What are slot wedges in a DC machine made of? Silicon steel. Mild steel. Fibre. Cast iron. Silicon steel. Mild steel. Fibre. Cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In dc machine armature windings are placed on rotor because of the necessity for generation of voltage. commutation. development of torque. electromechanical energy conversion. generation of voltage. commutation. development of torque. electromechanical energy conversion. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Maximum efficiency will occur, when copper loss is_______to iron loss? any of the above equal to greater than less than any of the above equal to greater than less than ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of rotating magnetic field of 8 pole 50 Hz induction motor is 1000 rpm 1500 rpm 750 rpm 3000 rpm 1000 rpm 1500 rpm 750 rpm 3000 rpm ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The mmf produced by rotor currents of a 3 - Φ induction motor rotates at synchronous speed with respect to rotor. is at standstill with respect to stator mmf. rotates at the speed of rotor in the air gap. rotates at slip speed with respect to stator mmf. rotates at synchronous speed with respect to rotor. is at standstill with respect to stator mmf. rotates at the speed of rotor in the air gap. rotates at slip speed with respect to stator mmf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Width of a carbon brush should be equal to the width more than 3 commutator segment. the width of the 1 to 2 commutator segment. the width of the 2 to 3 commutator segment. less than the width of commutator segment. the width more than 3 commutator segment. the width of the 1 to 2 commutator segment. the width of the 2 to 3 commutator segment. less than the width of commutator segment. ANSWER DOWNLOAD EXAMIANS APP
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