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# Resistor

$$
\begin{align\*}
i &= \sqrt{2} I \sin(wt + \psi\_i)
\ \ \\
u = R i &= \sqrt{2} RI \sin(wt + \psi\_i)
\ \\
u &= \sqrt{2} U \sin(wt + \psi\_i)
\end{align\*}
$$

As you can see, here not much to say.