The rms value of potential difference $V$ shown in the figure is

The rms value of potential difference $V$ shown in the figure is
  1. $V_0$
  2. $\frac{V_0}{\sqrt{2}}$
  3. $\frac{V_0}{2}$
  4. $\frac{V_0}{\sqrt{3}}$

Solution

$V_{\mathrm{rms}}=\left[\frac{1}{T} \int_0^{T / 2} V_0^2 d t\right]^{1 / 2}$ $\begin{aligned} & =\left[\frac{V_0^2}{T}[t]_0^{T / 2}\right]^{1 / 2} \\ & =\left[\frac{V_0^2}{T}\left(\frac{T}{2}\right)\right]^{1 / 2} \\ V_{\mathrm{rms}} & =\left[\frac{V_0^2}{2}\right]^{1 / 2} \\ V_{\mathrm{mms}} & =\frac{V_0}{\sqrt{2}} \end{aligned}$ :

Asked in: NEET 2011 (Mains)

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