percentage regulation is defined as
[{v(no load)-v(full load)}/v(full load)]*100%
it gives the variation of output dc voltage(voltage across load) with variation in load resistance
A: Rectifier do not provide any regulation they merely rectify the AC. The percent regulation if any is a function of the capacitor filters and the load impressed on them
Regulation of transformer means percentage reduction of transformer secondary voltage due to transformer loading as compared to its no load voltage.Another AnswerA transformer's voltage regulation is defined as 'the change in its secondary voltage, from no-load to full-load, at a specified power factor, expressed as a percentage of its full-load voltage, with the primary supply voltage held constant'.
It does not depend on the line. The regulation is the percentage change in voltage caused by applying the full load current, and that depends on the transformer supplying the line. A value of 5% would be typical.
The volatge regaulation be calculated by calculating the percentage difference between volatge at no load and voltage at full load
To regulate the pressure to a pre-determined amount.