DC Generators Magnetic field in a D.C. generator is produced by Electromagnets None of these Permanent magnets Both (A) and (B) Electromagnets None of these Permanent magnets Both (A) and (B) ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected None of these Indicated by a spark completely around the commutator Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected None of these Indicated by a spark completely around the commutator ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a wave winding, the commutator pitch is approximately equal to Thrice the pole pitch Pole pitch Twice the pole pitch None of the listed here Thrice the pole pitch Pole pitch Twice the pole pitch None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will be of 5 Hz will be of 5 xiVHz will be of v Hz 5 will be zero will be of 5 Hz will be of 5 xiVHz will be of v Hz 5 will be zero ANSWER DOWNLOAD EXAMIANS APP
DC Generators As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately 25 percent 10 percent 5 percent 40 percent 25 percent 10 percent 5 percent 40 percent ANSWER DOWNLOAD EXAMIANS APP
DC Generators Which of the following will not prevent a self excited shunt generator from building upto its full voltage? Wrong direction of rotation Open field No residual magnetism Speed too high Wrong direction of rotation Open field No residual magnetism Speed too high ANSWER DOWNLOAD EXAMIANS APP
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