Question
Distinguish between the terms ‘effective value’ and peak value of alternating current.
✓
Answer
Alternating current changes in magnitude as well as direction. The maximum value of the alternating current is called the peak value. It is denoted by I0. The square root of mean square value of current is called the ‘effective value’ or ‘rms value’ of current. The two are related by
Effective value, $\text{E}_{\text{eff}}=\frac{\text{I}_0}{\sqrt{2}}$
Effective value, $\text{E}_{\text{eff}}=\frac{\text{I}_0}{\sqrt{2}}$
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