DC Generators Carbon brushes are used in a dc machine because _______ Carbon lubricates and polishes the commutator Carbon is cheap Contact resistance is decreased None of the listed here Carbon lubricates and polishes the commutator Carbon is cheap Contact resistance is decreased None of the listed here 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 1 Ω 0.5 Ω 0.025 Ω 0.055 Ω 1 Ω 0.5 Ω 0.025 Ω 0.055 Ω ANSWER DOWNLOAD EXAMIANS APP
DC Generators A 6 pole lap wound generator has 300 conductors, the emf induced per conductor being 5 V. The generated voltage of the generator is _____ 1500 V 60 V 360 V 250 V 1500 V 60 V 360 V 250 V ANSWER DOWNLOAD EXAMIANS APP
DC Generators Current versus time graph for an ideal commutation is a Parabola None of the listed here Hydrobola Straight line Parabola None of the listed here Hydrobola Straight line ANSWER DOWNLOAD EXAMIANS APP
DC Generators Magnetic field in a D.C. generator is produced by Electromagnets Both (A) and (B) Permanent magnets None of these Electromagnets Both (A) and (B) Permanent magnets None of these ANSWER DOWNLOAD EXAMIANS APP
DC Generators Shunt generators are most suited for stable parallel operation because of their drooping voltage characteristics identical voltage characteristics rising voltage characteristics linear voltage characteristics drooping voltage characteristics identical voltage characteristics rising voltage characteristics linear voltage characteristics ANSWER DOWNLOAD EXAMIANS APP
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