Alternators MCQs

In alternator, during hunting when the speed becomes supersynchronous, the damper bars develop

Regulation of an alternator is likely to be negative in case of

Two alternators are connected in parallel. Their kVA and kW load shares can be changed by changing respectively their

The following are the experimental data required for potier method for finding the voltage regulation of an alternator

To eliminate nth harmonic from the induced emf in a phase of a synchronous machine, he ratio of the pitch of the coils to the full-pitch must be

In an alternator, if the armature current is leading the generated voltage by 90?, the effect of armature reaction will be

Distributed windings instead of concentrated in an alternator results in I. improvement in the shape of voltage II. increase in the spead of the machine III, increased rigidity and mechanical strength of winding IV. reduced armature reaction Combinations

The name plate of an alterantor indicate an operating pf of 0.85. The natu re of this pf is

The Potier's triangle separates the