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DC Generators

DC Generators
In D.C. generators on no-load, the air gap flux distribution in space is

Sinusoidal
Pulsating
Flat topped
Triangular

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DC Generators
For a D.C. machines laboratory following type of D.C. supply will be suitable

Synchronous motor D.C. generator set
Mercury are rectifier
Induction motor D.C. generator set
Rotary converter

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DC Generators
In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralized by all of the following except

Dummy coils
Interpoles
Shifting of axis of brushes
Compensating winding

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DC Generators
High voltage dc machine use _____ winding.

Either lap or wave
None of the listed here
Lap
Wave

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DC Generators
In D.C. generators, current to the external circuit from armature is given through

Solid connection
Commutator
Slip rings
None of above

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DC Generators
Open circuited armature coil of a D.C. machine is

None of these
Indicated by a spark completely around the commutator
Identified by the scarring of the commutator segment to which open circuited coil is connected
Both of the listed here

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