Question 389: AC fundamentals

Question

Which graph shows the correct variation of r.m.s. current 'I' with frequency 'f' of a.c. in case of (LCR) parallel resonance circuit?
![](https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1ly64npfd/575dfed2-be06-45b7-a97b-3143187e76ab/e4817690-3963-11ef-8b5c-fd4ad51b16c2/file-jaoe38c1ly64npfe.png?format=png)

Accepted Answer

$\begin{aligned}
& e=e_0 \cos \omega t=10 \cos 2 \pi \mathrm{ft} \
& f=50 \mathrm{~Hz}, \quad t=\frac{1}{600} s \
& \begin{aligned}
	herefore \quad=10 \cos 100 \pi 	imes \frac{1}{600}=10 \cos \frac{\pi}{6} \
\quad=10 \frac{\sqrt{3}}{2}=5 \sqrt{3} V
\end{aligned}
\end{aligned}$

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AC fundamentals

Which graph shows the correct variation of r.m.s. current 'I' with frequency 'f' of a.c. in case of (LCR) parallel resonance circuit?

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