# Which of the following values of an alternating voltage or current represents the real magnitude?

Which of the following values of an alternating voltage or current represents the real magnitude?

### Right Answer is:

RMS value

#### SOLUTION

**RMS values of an alternating voltage or current represent the real magnitude.**

__Root-Mean-Square (RMS) Value:__

- The RMS value of an alternating current is given by that steady (DC) current which when flowing through a given circuit for a given time produces the same heat as produced by the alternating current when flowing through the same circuit for the same time.
- It is also known as the effective or virtual value of the alternating current, the former term being used more extensively.

RMS value of the alternating quantity is given as,

**V _{RMS} = V_{m}/√2**

**I _{RMS} = I_{m}/√2**