Electrical Machines DC generator will not build up voltage due to wrong direction of rotation. if field resistance is more than critical resistance. any one of above. if it has lost residual magnetism. due to wrong direction of rotation. if field resistance is more than critical resistance. any one of above. if it has lost residual magnetism. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To achieve spark less commutation brushes of DC generator are rocked ahead so as to bring them in magnetic neutral axis. None of these just behind the magnetic neutral axis. just ahead of magnetic neutral axis. in magnetic neutral axis. None of these just behind the magnetic neutral axis. just ahead of magnetic neutral axis. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following will vary the maximum torque? None of these rotor resistance R both 1 and 2 rotor reactance X None of these rotor resistance R both 1 and 2 rotor reactance X ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If direct axis reactance Xd and quadrature axis reactance Xq are equal, then reluctance power is All of these minimum maximum zero All of these minimum maximum zero ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines A differentially compound motor under high-over-load conditions will behave like a / an AC synchronous motor. shunt motor. cummulative compound motor. series motor. AC synchronous motor. shunt motor. cummulative compound motor. series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In alternator, the rotary part is core. armature. magnetic field poles. none of these. core. armature. magnetic field poles. none of these. ANSWER DOWNLOAD EXAMIANS APP
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