An AC source rated 220, V , 50, Hz is connect | vedclass

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Question

$i = i _{0} \cos (\omega t )$

$i = i _{0}$ at $t =0$

$i =\frac{ i _{0}}{\sqrt{2}}$ at $\omega t =\frac{\pi}{4}$

$t =\frac{\pi}{4 \omega}=\fra

Vedclass · Accepted Answer

$2.5\, ms$

Vedclass · Answer

$i = i _{0} \cos (\omega t )$

$i = i _{0}$ at $t =0$

$i =\frac{ i _{0}}{\sqrt{2}}$ at $\omega t =\frac{\pi}{4}$

$t =\frac{\pi}{4 \omega}=\frac{\pi}{4(2 \pi f )}=\frac{1}{8 f }$

$t =\frac{1}{400}=2.5 ms$

An $AC$ source rated $220\, V , 50\, Hz$ is connected to a resistor. The time taken by the current to change from its maximum to the rms value is

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