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 ______ 150 50 100 10 150 50 100 10 ANSWER DOWNLOAD EXAMIANS APP
DC Generators The efficiency of a dc generator means its Mechanical efficiency Overall efficiency Electrical efficiency None of the listed here Mechanical efficiency Overall efficiency Electrical efficiency None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators The armature winding of a dc machine is ______ winding. Partly open circuit and partly closed circuit A closed circuit An open circuit None of the listed here Partly open circuit and partly closed circuit A closed circuit An open circuit None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Generators Open circuited armature coil of a D.C. machine is Indicated by a spark completely around the commutator None of these Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected Indicated by a spark completely around the commutator None of these Both of the listed here Identified by the scarring of the commutator segment to which open circuited coil is connected ANSWER DOWNLOAD EXAMIANS APP
DC Generators While applying Fleming's right-hand rule to and the direction of induced e.m.f., the thumb points towards Direction of flux Direction of induced e.m.f. Direction of motion of conductor, if forefinger points along the lines of flux Direction of motion of the conductor if forefinger points in the direction of generated e.m.f. Direction of flux Direction of induced e.m.f. Direction of motion of conductor, if forefinger points along the lines of flux Direction of motion of the conductor if forefinger points in the direction of generated e.m.f. ANSWER DOWNLOAD EXAMIANS APP
DC Generators The main factor which leads to unstable parallel operation of flat and over compounded generators is their rising voltage characteristics unequal number of turns in their series field windings unequal speed regulation of their primemovers unequal series field resistances their rising voltage characteristics unequal number of turns in their series field windings unequal speed regulation of their primemovers unequal series field resistances ANSWER DOWNLOAD EXAMIANS APP
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