DC Generators The commutator of a dc generator acts as None of the listed here A rectifier An amplifier A load None of the listed here A rectifier An amplifier A load ANSWER DOWNLOAD EXAMIANS APP
DC Generators The efficiency of a dc generator is maximum when its variable loss is Equal to double the constant loss None of the listed here Equal to Constant loss Equal to half of constant loss Equal to double the constant loss None of the listed here Equal to Constant loss Equal to half of constant loss ANSWER DOWNLOAD EXAMIANS APP
DC Generators In a wave winding, the commutator pitch is approximately equal to Thrice the pole pitch Pole pitch None of the listed here Twice the pole pitch Thrice the pole pitch Pole pitch None of the listed here Twice the pole pitch ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main drawback of a dc shunt generator is that Generated voltage is small Shunt field circuit has high resistance Terminal voltage drops considerably It is expensive Generated voltage is small Shunt field circuit has high resistance Terminal voltage drops considerably It is expensive 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 Small High Zero The same as rated voltage Small High Zero The same as rated voltage ANSWER DOWNLOAD EXAMIANS APP
DC Generators When two D.C. series generators are running in parallel, an equalizer bar is used To reduce the combined effect of armature reaction of both machines So that two similar machines will pass approximately equal currents to the load To increase the series flux To increase the speed and hence generated e.m.f. To reduce the combined effect of armature reaction of both machines So that two similar machines will pass approximately equal currents to the load To increase the series flux To increase the speed and hence generated e.m.f. ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS