Electrical Machines Slot wedges in a dc machine is made up of mild steel. fibre. silicon steel. cast iron. mild steel. fibre. silicon steel. cast iron. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A dc shunt motor runs at a no-load speed of 1140 rpm. At full load, armature reaction weakens the main flux by 5% whereas the armature circuit voltage drops by 10%. The motor full-load speed in rpm is 1203 1200 1000 1080 1203 1200 1000 1080 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a transformer maximum flux density is not constant, the eddy current loss varies as V² f² f V V² f² f V ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An induction motor having 8 poles runs at 727.5 rpm. If the supply frequency is 50Hz, the emf in the rotor will have a frequency of 48.5Hz 1.5Hz 2.5Hz 51.5Hz 48.5Hz 1.5Hz 2.5Hz 51.5Hz ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the applied voltage of a certain transformer is increased by 50% and the frequency is reduced by 50%, the maximum flux density will (assuming that the magnetic circuit remains unsaturated) remain the same as the original changes to 0.5 times the original value changes to 1.5 times the original value changes to three times the original value remain the same as the original changes to 0.5 times the original value changes to 1.5 times the original value changes to three times the original value ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which motors are preferred for refrigeration and air conditioning in smaller units? Stepper motors. Universal motors. Reluctance motors. Induction motors. Stepper motors. Universal motors. Reluctance motors. Induction motors. ANSWER DOWNLOAD EXAMIANS APP
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