Electrical Machines Which of the following DC motors has got maximum relieving property? Differentical compound. Shunt. Cummulative compound. Series. Differentical compound. Shunt. Cummulative compound. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC generators, electric current to the external circuit from armature is given through solid connection. commutator. none of above. slip rings. solid connection. commutator. none of above. slip rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature resistance of a permanent magnet dc motor is 0.8 Ohm. At no load, the motor draws 1.5 A from a supply voltage of 25 V and runs at 1500 rpm. The efficiency of the motor while it is operating on load at 1500 rpm drawing a current of 3.5 A from the same source will be 59.2%. 57.1%. 88.8%. 48.0%. 59.2%. 57.1%. 88.8%. 48.0%. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Autotransformer makes effective saving on copper and copper losses, when its transformation ratio is equal to greater than one. approx to one. less than one. very low greater than one. approx to one. less than one. very low ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines An ideal synchronous motor has no starting torque because rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. rotor is made up of salient poles. relative velocity between the stator and rotor mmf’s is zero. rotor winding is highly reactive. relative velocity between stator and rotor mmf’s is not zero. rotor is made up of salient poles. relative velocity between the stator and rotor mmf’s is zero. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The commutator segments of DC machines are made up of hard-drawn copper brass copper alloy copper hard-drawn copper brass copper alloy copper ANSWER DOWNLOAD EXAMIANS APP
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