Electrical Machines If we increase the rotor reactance value, the maximum torque will increase None of these decrease not changed increase None of these decrease not changed ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A small air gap in poly phase induction motor helps to reduce chance of cogging. reduce chance of crawling. increase starting torque. reduce magnetizing current. reduce chance of cogging. reduce chance of crawling. increase starting torque. reduce magnetizing current. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A part an alternator winding consist of eight coils in series, each having an emf of 20 V rms induced in it. Coils are placed in successive slots and between each slot and the next, there is an electrical phase displacement of 30°. Find the emf of eight coils in series 56.91 V. 76.91 V. 86.91 V. 66.91 V. 56.91 V. 76.91 V. 86.91 V. 66.91 V. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which motor used in Lathe machine? D.C. cumulative compound motor. D.C. shunt motor. None of these D.C . series motor. D.C. cumulative compound motor. D.C. shunt motor. None of these D.C . series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a specific open-circuit voltage of a DC generator, the short-circuit electric current will be maximum when it is cumulatively compounded. separately excited. differentially compounded. shunt connected. cumulatively compounded. separately excited. differentially compounded. shunt connected. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The rotor speed of an induction motor is given by Nr = 120f / p × (1-s). Ns = 120f / p × ( 1 - s ). Ns = 120f /p × ( 1 - r). None of these Nr = 120f / p × (1-s). Ns = 120f / p × ( 1 - s ). Ns = 120f /p × ( 1 - r). None of these ANSWER DOWNLOAD EXAMIANS APP
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