DC Generators Carbon brushes are used in a dc machine because _______ None of the listed here Carbon is cheap Carbon lubricates and polishes the commutator Contact resistance is decreased None of the listed here Carbon is cheap Carbon lubricates and polishes the commutator Contact resistance is decreased ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main factor which leads to unstable parallel operation of flat and over compounded generators is unequal speed regulation of their primemovers unequal number of turns in their series field windings unequal series field resistances their rising voltage characteristics unequal speed regulation of their primemovers unequal number of turns in their series field windings unequal series field resistances their rising voltage characteristics ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature winding of a dc machine is ______ winding. An open circuit None of the listed here Partly open circuit and partly closed circuit A closed circuit An open circuit None of the listed here Partly open circuit and partly closed circuit A closed circuit ANSWER DOWNLOAD EXAMIANS APP
DC Generators The number of parallel paths in a simplex lap winding is equal to None of the listed here Number of poles Number of pairs of poles 2 None of the listed here Number of poles Number of pairs of poles 2 ANSWER DOWNLOAD EXAMIANS APP
DC Generators The number of brushes in a commutator depends on Type of winding Speed of armature Voltage Amount of current to be collected Type of winding Speed of armature Voltage Amount of current to be collected ANSWER DOWNLOAD EXAMIANS APP
DC Generators If the flux per pole of dc generator is halved but its speed is doubled, its generated emf will Be halved Remain the same Be doubled Be quadrupled Be halved Remain the same Be doubled Be quadrupled ANSWER DOWNLOAD EXAMIANS APP
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