DC Generators Magnetic field in a D.C. generator is produced by Permanent magnets Electromagnets Both (A) and (B) None of these Permanent magnets Electromagnets Both (A) and (B) None of these ANSWER DOWNLOAD EXAMIANS APP
DC Generators Inter-pole flux should be sufficient to Neutralize the armature reaction flux Neutralize both the armature reaction flux as well as commutating e.m.f. induced in the coil None of these Neutralize the commutating self induced e.m.f. Neutralize the armature reaction flux Neutralize both the armature reaction flux as well as commutating e.m.f. induced in the coil None of these Neutralize the commutating self induced e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Generators A separately excited generator as compared to a self-excited generator Is amenable to better voltage control Has all above features Has exciting current independent of load current Is more stable Is amenable to better voltage control Has all above features Has exciting current independent of load current Is more stable ANSWER DOWNLOAD EXAMIANS APP
DC Generators If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be The same as rated voltage Small High Zero The same as rated voltage Small High Zero ANSWER DOWNLOAD EXAMIANS APP
DC Generators The efficiency of a dc generator is maximum when its variable loss is Equal to Constant loss Equal to double the constant loss Equal to half of constant loss None of the listed here Equal to Constant loss Equal to double the constant loss Equal to half of constant loss None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature of a dc machine is made of ______ Soft iron Silocon steel Cast steel Wrought iron Soft iron Silocon steel Cast steel Wrought iron ANSWER DOWNLOAD EXAMIANS APP
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