Question

In an A.C circuit with voltage V and current I the power desipated is

• A. $\frac{VI}{\sqrt{2}}$
• B. $\frac{VI}{2}$
• C. depends on the phase difference between $V$ and $I$
• D. $VI$

Answer 1

The correct option is C depends on the phase difference between $V$ and $I$

$P=VIcos\theta$.
Where $V$ and $I$ are RMS values for applied voltage and current respectively and considering them as the fix.
The power dissipated will be depending on $cos\left(\theta \right)$ where $\theta$ is the phase angle between voltage and current.

So, the correct option is $\left(C\right)$