Electrical Machines The armature mmf of a DC machine has trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. trapezoidal space distribution and is stationary in space. stepped distribution and rotates at the speed of armature. triangular space distribution and rotates at the speed of armature. triangular space distribution and is stationary in space. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines The armature MMF waveform of a DC machine is triangular. sinusoidal. pulsating. rectangular. triangular. sinusoidal. pulsating. rectangular. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing carbon brushes. commutator with large number of segments. equalizer rings. graphite brushes. carbon brushes. commutator with large number of segments. equalizer rings. graphite brushes. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines To avoid formation of grooves in the commutator None of these the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. None of these the brushes of opposite polarity should track each other. brush position has no effect on the commutator grooving. the brushes of same polarity should track each other. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC machine the armature mmf is stationary with respect to field poles. rotating with respect to field poles. stationary with respect to armature. rotating with respect to field poles as well as armature. stationary with respect to field poles. rotating with respect to field poles. stationary with respect to armature. rotating with respect to field poles as well as armature. ANSWER DOWNLOAD EXAMIANS APP
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