Electrical Machines In DC generators brushes are used for collecting of voltage convert ac armature current in to dc reduce eddy current loss collecting of current without any sparkings collecting of voltage convert ac armature current in to dc reduce eddy current loss collecting of current without any sparkings ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In electric locomotives which of the following motor are used ? Synchronous motor. DC Shunt motor. DC compound motor. DC series motor. Synchronous motor. DC Shunt motor. DC compound motor. DC series motor. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines In a DC generator, the ripples in the direct emf generated are reduced by employing graphite brushes. commutator with large number of segments. carbon brushes. equalizer rings. graphite brushes. commutator with large number of segments. carbon brushes. equalizer rings. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines Cross magnetization effects which of the following? both 2 and 3 commutation reduction in main field flux reduces the terminal voltage both 2 and 3 commutation reduction in main field flux reduces the terminal voltage ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If the flux of DC motor approaches zero, its speed will approach zero. remain unchanged. aprroach infinity. between zero and infinity. approach zero. remain unchanged. aprroach infinity. between zero and infinity. ANSWER DOWNLOAD EXAMIANS APP
Electrical Machines If s is the slip and f is the supply frequency of an induction motor, the frequency of rotor current is given by sf. s2. f / s. sf / 2. sf. s2. f / s. sf / 2. ANSWER DOWNLOAD EXAMIANS APP
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