Electrical Machines In case of induction motors the ratio of length to pole pitch for minimum cost, is taken as 3 to 5. 2 to 3. 1.5 to 2. 1.0. 3 to 5. 2 to 3. 1.5 to 2. 1.0. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator? 201.02 V. 210 V. 205 V. 212 V. 201.02 V. 210 V. 205 V. 212 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The sparking at the the brushes, in a DC machines is due to reactance voltage. armature reaction. high resistance of carbon brushes. presence of commutator. reactance voltage. armature reaction. high resistance of carbon brushes. presence of commutator. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous motor, damper windings are provided on pole faces. rotor shaft. None of these stator frame. pole faces. rotor shaft. None of these stator frame. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of following DC motors will have percentage increase of input current for the same percentage increase in torque? Shunt. Differntical compound. Series. Cummulative compound. Shunt. Differntical compound. Series. Cummulative compound. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A 8-pole, DC generator has a simplex wave-wound armature containing 32 coils of 6 turns each. Its flux per pole is 0.06 Wb. The machine is running at 250 rpm. The induced armature voltage is 96 V 384 V 192 V 768 V 96 V 384 V 192 V 768 V ANSWER DOWNLOAD EXAMIANS APP
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