What is the process to find true power in an electrical circuit from apparent power?

Finding true power in an electrical circuit, also known as real power, involves understanding the relationship between apparent power and power factor. Apparent power is a product of the voltage and current in a circuit, measured in volt-amperes (VA), but it does not account for the phase difference between the voltage and current waveforms caused by reactive components.

True power, on the other hand, reflects the actual power consumed by the resistive components of the circuit and is measured in watts (W). The power factor is a critical component in this relationship, as it represents the cosine of the phase angle between the current and voltage waveforms.

To calculate the true power, you take the apparent power and multiply it by the power factor. This adjustment allows you to account for how effectively the circuit is using the electrical power. Since the true power can only come from the portion of apparent power that is 'real' and not reactive, this multiplication provides an accurate measure of the power that is genuinely converted to work in the circuit.

Other options presented do not accurately represent the process of calculating true power. Subtracting voltage from current doesn't yield any meaningful value in the context of power calculations. Dividing current by resistance gives you current, while adding resistive