Alternating Current: Practice Problem & Solution

Solution Explained:

To solve this problem, we apply the core principles of Alternating Current. Understanding the underlying formula is key to arriving at the correct answer below:

The average power dissipated in an A.C. circuit is $P = V_{rms} I_{rms} \cos\phi$.
Here, $\phi$ is the phase angle between the voltage and the current.
The term $\cos\phi$ is known as the power factor.
Therefore, power dissipated depends on the phase angle between V and I.