DC GENERATORS

So that two similar machines will pass approximately equal currents to the load

To reduce the combined effect of armature reaction of both machines

To increase the series flux

To increase the speed and hence generated e.m.f.

So that the two identical machines will pass approximately equal currents to the load

To reduce the combined effect of armature reaction of both the machines

To increase the generated e.m.f.

To increase the series flux

Copper

Cast-iron

Nonferrous material

Silicon steel

Using carbon brushes of superior quality

Using conductor of annealed copper

Using equalizer rings

Using commutator with large number of segments

None of these

Both (A) and (B)

Permanent magnets

Electromagnets