53) Brush tension in a DC generator plays very important role in its performance. Excessive brush tension may

slow down the speed of the machine

decrease the output voltage

increase the output voltage

overheat the commutator and wear out the surface

Answer is:

overheat the commutator and wear out the surface

increase the induced e.m.f.

reduce the eddy current loss

reduce the copper loss

reduce the armature reaction effect

Answer is:

armature current and emf

armature current and terminal voltage

load current and terminal voltage

field current and terminal voltage

Answer is:

to collect current from the commulator

to facilitate collection of current from the armature conductors

to convey the current from the brushes to the holder

to prevent the brush from flying out under the centrifugal force

Answer is:

Rough commutation

Cross magnetizing effect

Demagnetizing effect

Armature resistance drop effect

Answer is: