01․ If the armature electric current is increased to double its previous value, and the time of commutation is halved, how will the reactance voltage vary?
Under construction.
02․ To have sparkless commutation, the armature reaction effect in a DC machine is neutralized by
Under construction.
03․ Armature reaction of an unsaturated DC machine is
Under construction.
04․ Iron losses in a DC machine are independent of variation in
Under construction.
05․ In a DC generator in case the brushes are moved so as to bring them in magnetic neutral axis, then, there will be
Under construction.
06․ In a DC generator, the armature reaction results in
Under construction.
07․ In a DC generator the actual flux distribution depends upon
Under construction.
08․ The demagnetising component of armature reaction in a DC generator
Under construction.
09․ Armature coil is short circuited by brushes when it lies
Under construction.
10․ Compensating windings are used in DC generators
Under construction.
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