Hỏi $U_{Cmax}$ gấp bao nhiêu lần $U_{Rmax}$

$U_{cmax}=3U_{lmax}\Leftrightarrow \dfrac{U\sqrt{Z_{L}^{2}+R^{2}}}{R}=\dfrac{3UZ_{L}}{R}$
$\Rightarrow$ $8Z_{L}^{2}=R^{2}$
$\Rightarrow$$U_{Cmax}= \dfrac{3U}{2\sqrt{2}}\approx 1,06U$
mà $U_{Rmax}=U$
$\Rightarrow$Chọn A