Alternating Current — Physics STD 12 Science — Question
Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsAlternating Current1 Mark
Question
Write the definition of root mean square value of alternating current.
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Answer
The square root of the mean square of the instantaneous value of alternating curent is called the root mean square value $I_{ rms }$ of the current. $I ^2= I _0^2 \sin ^2 \omega t$ $I _{ rms }=\frac{ I _0}{\sqrt{2}}$ or $I _{ rms }=0.707 I _0$ Root mean square value of ac current is obtained by multiplying its peak value by $\frac{1}{\sqrt{2}}$ or 0.707
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