How do you calculate the average power delivered by an alternating current?

To calculate the average power delivered by an alternating current, you need to use the formula P = VrmsIrmscos(θ).

The average power delivered by an alternating current is the amount of power delivered over a period of time. It is calculated using the formula P = VrmsIrmscos(θ), where Vrms is the root mean square voltage, Irms is the root mean square current, and θ is the phase angle between the voltage and current.

The root mean square (rms) value of a waveform is the equivalent DC voltage or current that would produce the same power as the AC waveform. It is calculated by taking the square root of the mean of the squared values of the waveform over one cycle.

The phase angle θ is the angle between the voltage and current waveforms. It can be positive or negative, depending on whether the voltage leads or lags the current.

The cosine of the phase angle is a measure of the power factor of the circuit. A power factor of 1 means that the voltage and current are in phase, and all the power is delivered to the load. A power factor of less than 1 means that some of the power is lost due to reactive components in the circuit.

In summary, to calculate the average power delivered by an alternating current, you need to find the rms values of the voltage and current, determine the phase angle between them, and use the formula P = VrmsIrmscos(θ).