**Contents**show

## Which method is better to find the voltage regulation?

Which of the following voltage regulation method is accurate ? In Potier Triangle or **ZPF method**, voltage quantities are calculated on emf basis and mmf quantities are calculated on mmf basis. Therefore, ZPF method is most accurate among all these four methods.

## Which method gives most accurate result for voltage regulation of alternator?

**Z.P.F method** gives most accurate result for finding voltage regulation of an alternator.

## Which method is used for finding voltage regulation in alternator?

The various indirect methods of determining voltage regulation are, **Synchronous Impedance Method** or EMF Method. Ampere-turn Method or MMF Method of Voltage Regulation. Zero Power Factor Method or Potier Method.

## What is voltage regulation method?

Voltage regulation is defined as the change in terminal voltage expressed as a fraction of full load rated voltage when the load at a given power factor is removed while keeping the speed and field current constant. Voltage regulation formula, Voltage regulation **= (E _{F} – V_{T}) / V_{T} in P.U**.

## What is EMF and MMF method?

EMF is the force that is responsible for driving the electrons in an electric circuit. Magnetomotive force is abbreviated as MMF. **MMF is the driving force required to drive the magnetic flux through the circuit**.

## Which method is not suitable for finding percentage regulation?

**Direct loading method** is not suitable for finding percentage regulation.

## Which of the following methods gives accurate results?

Accuracy- Although **the census method** provides more accurate and reliable results as compared to the sampling method but in the sampling method the errors can be easily located and rectified in the sampling methods due to the smaller number of items.

## Which of the following method of voltage regulation is more closer to true value of voltage regulation of alternator?

Explanation: As the given value is very close to actual, so it must be **zpf or asa method of** regulation.

## Which of the following method is used for voltage control?

The voltage control in transmission and distribution systems is usually obtained by using **tap changing transformers**. In this method, the voltage in the line is adjusted by changing the secondary EMF of the transformer by varying the number of secondary turns.