A circuit consists of a voltage source in series with a single element. If $v = \cos(5t)$ and $i = \sin(5t)$, the element is a resistor a capacitor an inductor
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We can write $v = \cos(5t)$ and $i = \sin(5t) = \cos(5t - \frac{\pi}{2})$. The phase difference between voltage and current is $\frac{\pi}{2}$ radians or 90 degrees. Show more…
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