Electrical Machines The torque angle, in a synchronous motor, is the angle between the rotating stator flux and rotor flux. the supply voltage and the back emf. None of these magnetizing electric current and back emf. the rotating stator flux and rotor flux. the supply voltage and the back emf. None of these magnetizing electric current and back emf. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In salient pole synchronous machine, the reluctance power varies as cosδ cos2δ sin2δ sinδ cosδ cos2δ sin2δ sinδ 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? Cummulative compound. Shunt. Differntical compound. Series. Cummulative compound. Shunt. Differntical compound. Series. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Sparkless commutation can be achieved by employing any one or more of the above methods. high resistance carbon brushes. compensating winding. inter poles. any one or more of the above methods. high resistance carbon brushes. compensating winding. inter poles. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Quadrature axis synchronous reactance is the ratio of Vmax to Imax. Vmin to Imin. Vmax to Imin. Vmin to Imax. Vmax to Imax. Vmin to Imin. Vmax to Imin. Vmin to Imax. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The change in speed of a DC generator due to increased load is corrected by increasing armature cooling. increasing terminal voltage. increasing armature resistance. increasing input power of the prime mover. increasing armature cooling. increasing terminal voltage. increasing armature resistance. increasing input power of the prime mover. ANSWER DOWNLOAD EXAMIANS APP
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