Electrical Machines The volt-ampere euation for a long-shunt compound motor is given by Vt = Ea + Ia(ra + rs) Vt= Ea– Iara Vt = Ea + Iara+ ILrs Vt= Ea + Iara Vt = Ea + Ia(ra + rs) Vt= Ea– Iara Vt = Ea + Iara+ ILrs Vt= Ea + Iara ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The polarity of a DC generator can be reversed by reversing field electric current as well as direction of rotation. reversing the field current. any of above. increasing field current. reversing field electric current as well as direction of rotation. reversing the field current. any of above. increasing field current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Ward Leonard control provides speed control in one direction only. above rated speed. below rated speed. in both direction. in one direction only. above rated speed. below rated speed. in both direction. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In star-delta starting of squirrel cage induction motor compared to DOL starting the starting current and torque are 1/3, 1/3 1/3, 1/√3 1/√3, 1/√3 1/√3, 1/3 1/3, 1/3 1/3, 1/√3 1/√3, 1/√3 1/√3, 1/3 ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Silicon content in steel lamination is kept within 5% as it increases hysteresis loss. All of these Increases cost. makes the material brittle. increases hysteresis loss. All of these Increases cost. makes the material brittle. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In DC machines internal characteristics are plotted between Eg vs Ia Eg vs load current Vt vs load current Vt vs Ia Eg vs Ia Eg vs load current Vt vs load current Vt vs Ia ANSWER DOWNLOAD EXAMIANS APP
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