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 $I_0$. 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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