Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing commutator with large number of segments. equalizer rings. graphite brushes. carbon brushes. commutator with large number of segments. equalizer rings. graphite brushes. carbon brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature mmf of a DC machine has trapezoidal space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. stepped distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. trapezoidal space distribution and is stationary in space. triangular space distribution and rotates at the speed of armature. stepped distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Voltage across the open circuited field termninals of a synchorous machine under slip test is AC of supply frequency. DC. A modulated supply frequency AC voltage with slip frequency envelop. DC of slip frequency. AC of supply frequency. DC. A modulated supply frequency AC voltage with slip frequency envelop. DC of slip frequency. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines For a standard frequency the machine operates at a particular speed known as slip speed. normal speed. any of the above. synchronous speed. slip speed. normal speed. any of the above. synchronous speed. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Due to magnetic saturation, the flux per pole in a DC machine without brush shift decreases in generators and increases in motor with load. increases in generators but decreases in motor with load. increases in both the generators and the motors with load. decreases in both generators and the motors with load. decreases in generators and increases in motor with load. increases in generators but decreases in motor with load. increases in both the generators and the motors with load. decreases in both generators and the motors with load. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Which of the following relation is correct? Xd > Xq. Xd = Xq. Xd < Xq. None of these Xd > Xq. Xd = Xq. Xd < Xq. None of these ANSWER DOWNLOAD EXAMIANS APP
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