# What is the average voltage Vavg of the source?

#### Understand the Problem

The question is asking for the average voltage of a source. This typically requires an understanding of the context in which voltage is measured, as well as the method used to calculate the average, which may involve integration or summation over a specific time period.

#### Answer

RMS (root mean square) value.

The final answer is the RMS (root mean square) value in AC circuits.

##### Answer for screen readers

The final answer is the RMS (root mean square) value in AC circuits.

#### More Information

In alternating current (AC) systems, the average voltage is often represented by the root mean square (RMS) value because the average of a symmetrical AC waveform over a complete cycle is zero.

#### Tips

A common mistake is confusing the average voltage with the RMS value for AC circuits. The average voltage of pure AC over a full cycle is zero, but the RMS value is used to represent the effective voltage.