Discussion
Voltage regulation of a dc generator is defined as
Answer: B
Correct answer: the no-load voltage less the full-load voltage, as a fraction of full load
Voltage regulation is defined as
\[ \text{regulation} = \frac{V_{nl} - V_{fl}}{V_{fl}} \]usually expressed as a percentage. A small figure means the terminal voltage holds up well as load is applied, which is what a lighting or battery-charging load wants. A cumulatively compounded machine can be arranged to give zero or even negative regulation, its voltage rising with load to compensate for the drop in the feeder.
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