DC Generators
The open circuit voltage of a compound generator is 250 V. At full load the terminal voltage

None of these
Will always be 250 V
May be greater or less than 250 V
Will be less than 250 V

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DC Generators
When two D.C. series generators are running in parallel, an equalizer bar is used

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

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