DC Generators Due to armature reaction, the main pole flux of a dc generator is None of the listed here Weakened as well as distorted Weakend only Distorted only None of the listed here Weakened as well as distorted Weakend only Distorted only ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature of a dc machine having 10 poles is rotating at a speed of 10 revolution per second. The number of hysteresis loops formed per second is ______ 50 10 100 150 50 10 100 150 ANSWER DOWNLOAD EXAMIANS APP
DC Generators The ideal commutation in a coil is not possible because each coil has Resistance Inductance Capacitance None of the listed here Resistance Inductance Capacitance None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators When two D.C. series generators are running in parallel, an equalizer bar is used To increase the series flux 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 speed and hence generated e.m.f. To increase the series flux 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 speed and hence generated e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main drawback of a dc shunt generator is that Shunt field circuit has high resistance It is expensive Generated voltage is small Terminal voltage drops considerably Shunt field circuit has high resistance It is expensive Generated voltage is small Terminal voltage drops considerably ANSWER DOWNLOAD EXAMIANS APP
DC Generators The bearings used to support the rotor shafts are generally Ball bearings Needle bearings Magnetic bearings Bush bearings Ball bearings Needle bearings Magnetic bearings Bush bearings ANSWER DOWNLOAD EXAMIANS APP
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