Electrical Machines Brushes are always placed on--------------- , in order to achieve sparkles commutation? None of these either GNA or MNA GNA MNA None of these either GNA or MNA GNA MNA ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a synchronous machine, if φ is the flux per pole and f is the frequency of the emf induced E then E ∝ 1/(φf) E ∝ φ/f E ∝ φf E ∝ f/φ E ∝ 1/(φf) E ∝ φ/f E ∝ φf E ∝ f/φ ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A series generator is connected in series to a feeder having 0.5Ω resistance to boost the voltage. The induced voltage is given by Eg = 0.6Ia, Ra = 0.2Ω and Rs = 0.3Ω. Find the voltage boosted by the generator, when delivering 400 Amp? 30 V. 60 V. 90 V. 40 V. 30 V. 60 V. 90 V. 40 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The power flow of a dc motor, with respect to a DC generator is modified. reversed. increased. none of these. modified. reversed. increased. none of these. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a dc generator operating on load with its brushes on the geometrical neutral axis (GNA), the magnetic neutral axis (MNA) is shifted in the direction of rotation. Now, if the brushes are given a lead of 90° (electrical), then the MNA will coincide with the GNA shift forward by more than 90° shift forward by less than 90° shift forward by 90° coincide with the GNA shift forward by more than 90° shift forward by less than 90° shift forward by 90° ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Drop in speed from no load to full load is very high in Shunt motor with interpoles. Series motor without interpoles. Series motor with interpoles. Cummulative compound motor with interpoles. Shunt motor with interpoles. Series motor without interpoles. Series motor with interpoles. Cummulative compound motor with interpoles. ANSWER DOWNLOAD EXAMIANS APP
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