DC Generators Magnetic field in a D.C. generator is produced by Permanent magnets Electromagnets None of these Both (A) and (B) Permanent magnets Electromagnets None of these Both (A) and (B) 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 Speed too high Open field No residual magnetism Wrong direction of rotation Speed too high Open field No residual magnetism ANSWER DOWNLOAD EXAMIANS APP
DC Generators For the same rating, a dc machine has_______ an ac machines. Less weight than None of the listed here The same weight as More weight than Less weight than None of the listed here The same weight as More weight than ANSWER DOWNLOAD EXAMIANS APP
DC Generators Carbon brushes are used in a dc machine because _______ 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 None of the listed here Carbon is cheap ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature copper loss in a dc generator is a None of the listed here Variable loss Constant loss Stray loss None of the listed here Variable loss Constant loss Stray loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 4-pole , lap wound dc shunt generator has an armature winding consisting of 220 turns each of 0.004 Ω. The armature resistance is 0.5 Ω 0.025 Ω 1 Ω 0.055 Ω 0.5 Ω 0.025 Ω 1 Ω 0.055 Ω ANSWER DOWNLOAD EXAMIANS APP
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