Electrical Machines A 3-phase, 50 Hz, 4 pole induction motor is running at 1440 rpm and rotor input power is 2KW. Find the rotor copper loss? 60W 40W 100W 80W 60W 40W 100W 80W ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following is/are the methods to reduce the armature reaction and its effects? compensating winding pole chamfering pole stacking All of these compensating winding pole chamfering pole stacking All of these ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The commutator segments of DC machines are made up of copper hard-drawn copper copper alloy brass copper hard-drawn copper copper alloy brass ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field? Zero Slip speed None of these Synchronous speed Zero Slip speed None of these Synchronous speed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator None of these the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. the brushes of opposite polarity should track each other. None of these the brushes of same polarity should track each other. brush position has no effect on the commutator grooving. the brushes of opposite polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The speed of a motor falls from 1100 r.p.m at no-load to 1050 r.p.m at rated load. The speed regulation of motor is 2.57 %. 3.76%. 2.56 %. 4.76%. 2.57 %. 3.76%. 2.56 %. 4.76%. ANSWER DOWNLOAD EXAMIANS APP
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